LONG DISTANCE CARRIER CODE ASSIGNMENTS

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Industry Analysis Division

Common Carrier Bureau

Federal Communications Commission

June 1997

This report is available for reference in the Common Carrier Bureau's Public Reference Room, 2000 M Street,

N.W., Room 575. Copies may be purchased by calling International Transcription Services, Inc. (ITS) at (202)

857-3800. The report can be downloaded [file name LDC1Q97.ZIP] from the FCC-State Link internet site

at http://www.fcc.gov/ccb/stats on the World Wide Web. The report can also be downloaded from the

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TABLE 1.

NUMBER OF CARRIER IDENTIFICATION CODES ASSIGNED BY BELL

COMMUNICATIONS RESEARCH (FIRST QUARTER 1982 THROUGH FIRST

QUARTER 1997) . . . 8

TABLE 2.

LIST OF FGB CIC CODE ASSIGNMENTS, SORTED BY CIC CODE . . . 9

TABLE 3.

LIST OF FGB CIC CODE ASSIGNMENTS, SORTED BY ENTITY . . . 16

TABLE 4.

LIST OF FGD CIC CODE ASSIGNMENTS, SORTED BY CIC CODE . . . 23

TABLE 5.

LIST OF FGD CIC CODE ASSIGNMENTS, SORTED BY ENTITY . . . 33

TABLE 6.

500 CODE BALANCE SHEET (AS OF MARCH 31, 1997) . . . 43

TABLE 7.

NUMBER OF 500 CODES ASSIGNED (THIRD QUARTER 1994 THROUGH FIRST

QUARTER 1997) . . . 43

TABLE 8.

LIST OF 500 CODE ASSIGNMENTS SORTED BY CODE . . . 44

TABLE 9.

LIST OF 500 CODE ASSIGNMENTS SORTED BY ENTITY . . . 48

TABLE 10.

555 LINE NUMBER BALANCE SHEET (AS OF MARCH 31, 1997) . . . 52

TABLE 11.

NUMBER OF 555 LINE NUMBERS ASSIGNED (SECOND QUARTER 1994

THROUGH FIRST QUARTER 1997) . . . 52

TABLE 12.

LIST OF 555 LINE NUMBER ASSIGNMENTS SORTED BY LINE NUMBER . . . 53

TABLE 13.

LIST OF 555 LINE NUMBER ASSIGNMENTS SORTED BY ENTITY . . . 71

TABLE 14.

TELEPHONE NUMBERS ASSIGNED FOR 800 SERVICE (APRIL 1993 THROUGH

APRIL 1997) . . . 89

TABLE 15.

TELEPHONE NUMBERS ASSIGNED FOR 888 SERVICE (FEBRUARY 1996

THROUGH APRIL 1997) . . . 90

TABLE 16.

900 CODE BALANCE SHEET (AS OF MARCH 31, 1997) . . . 91

TABLE 17.

NUMBER OF 900 CODES ASSIGNED TO INTEREXCHANGE CARRIERS (FIRST

QUARTER 1987 THROUGH FIRST QUARTER 1997) . . . 92

TABLE 18.

LIST OF 900 CODE ASSIGNMENTS SORTED BY CODE . . . 93

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LONG DISTANCE CARRIER CODE ASSIGNMENTS

This report contains information on carrier identification codes (CICs) and other

telecommunications numbering resources. The information in this report is used within the

telephone industry and by users of telephone services for a variety of purposes. CICs are used

within the telephone industry to, among other things, identify particular long distance carriers

and other access customers in order to bill and route traffic to them. As part of carrier access

codes, CICs are also used by customers to reach alternative carriers, such as "dial-around" long

distance providers.

The separate codes assigned to providers of 500 and 900 services are used by local telephone

companies to direct calls to the service provider. Both residential and business customers

frequently seek information from the Commission about these codes to identify particular

service providers.

Manufacturers require information on numbering resources to design and produce

telecommunications equipment efficiently. Vendors of equipment frequently seek information

on the growth of numbering resources to estimate potential demand. Major corporations and

government agencies that operate their own telecommunications networks need information on

numbering resources to efficiently interconnect their networks with the public switched network.

More generally, the evolution of numbering resources provides insight into the development of

competition in the long distance market. This report presents brief background information on

the administration of numbering resources and then summarizes the information specifically

related to carrier identification codes, 500 service, 555 line number assignments, 800 and 888

service, and 900 service.

Numbering Resources Administration

The North American Numbering Plan (NANP) is the basic format for telephone numbers in the

United States (including Puerto Rico, the Virgin Islands, Guam, and the Commonwealth of the

Northern Mariana Islands), Canada, Bermuda and the following Caribbean countries: Anguilla,

Antigua, Bahamas, Barbados, British Virgin Islands, Cayman Islands, Dominica, Dominican

Republic, Grenada, Jamaica, Montserrat, St. Kitts & Nevis, St. Lucia, St. Vincent, Turks &

Caicos Islands, and Trinidad & Tobago. Each telephone number within the NANP is a unique

ten-digit number that consists of three parts. The first is a three-digit code -- the Numbering

Plan Area or "NPA" code, which usually identifies a specific geographic area and is usually

simply called an "area code". In other cases, the first three digits provide caller access to unique

services (e.g., 500, 800, 888, and 900 service). The last two parts of each ten-digit number are a

three-digit central office code and a four-digit line number. Together, these seven digits usually

make up an ordinary local telephone number. In some cases, such as 500 and 900 service, the

office code has special uses other than identifying the geographic location of a central office. In

the following discussion, the three-digit central office code is sometimes referred to as the

"office code" or the "NXX" code.

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See Administration of the North American Numbering Plan, CC Docket No. 92-237, Report

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and Order, 11 FCC Rcd 2588 (1995).

Access providers are typically local exchange carriers that provide access customers with

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circuits that interconnect to the local carrier's public switched telephone network. Access

customers include interexchange carriers, wireless carriers, competitive access providers, and

large corporate users. Commission rules require that "interstate access services should be made

available on a non-discriminatory basis and, as far as possible, without distinction between end

user and IC [interexchange carrier] customers." Petition of First Data Resources, Inc., Regarding

the Availability of Feature Group B Access Service to End Users, Memorandum Opinion and

Order, 1986 WL 291786, (1986), released May 28,1986 (First Data Resources Order) at para.

13.

2 jurisdiction over those portions of the North American Numbering Plan that pertain to the

United States . . . [but does not] preclude the Commission from delegating to State commissions

or other entities all or any portion of such jurisdiction." The Network Services Division of the

Commission's Common Carrier Bureau oversees numbering resource matters.

The NANP was introduced by AT&T in 1947. AT&T administered the NPA codes centrally,

and the local exchange carriers administered the NXX codes and line numbers. After the AT&T

divestiture in 1984, Bell Communications Research (Bellcore) assumed the centralized number

administration functions.

On July 13, 1995, the Commission adopted a new model for administration of the NANP,

announcing its intention to establish the North American Numbering Council (NANC), a federal

advisory committee. The NANC will, among other tasks, advise the Commission and other

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NANP governments on numbering issues (such as local number portability implementation),

recommend selection of and guide an impartial NANP Administrator, and conduct initial

resolution of certain numbering disputes. The NANP Administrator selected by the NANC will

process number resource applications and maintain administrative numbering databases.

Operational details and additional activities of the NANP Administrator are to be determined by

the NANC. Additional information about the NANC is available from the Commission's

internet site at (http://www.fcc.gov/ccb/Nanc).

Carrier Identification Codes

CICs are numeric codes that, as originally devised, enabled local exchange carriers (LECs), as

providers of interexchange access services, to identify access customers in order to bill and route

traffic to such customers. Bellcore, as the current NANP Administrator, assigns these codes

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using guidelines developed by the Industry Carriers Compatibility Forum (ICCF), under the

auspices of the Carrier Liaison Committee (CLC) which is sponsored by the Alliance for

Telecommunications Solutions (ATIS), an industry forum. Currently, the Industry Numbering

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See Carrier Identification Code Assignment Guidelines, INC 95-0127-006, formerly ICCF

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92-0726-002, Revision September 1996 (CIC Assignment Guidelines, September 1996).

See First Data Resources Order, cited above at n.2.

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There are other interconnection access arrangements, not discussed in detail in this report, that

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do not require a CIC.

There currently exists a transition period concerning the conversion of Feature Group D codes

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from three-digits to four-digits. This period will end January 1, 1998. With three-digit codes,

customers are able to dial 10XXX where XXX is the three-digit CIC. With the conversion of codes

from three-digits to four-digits, customers will dial 101XXXX where XXXX is the four- digit CIC

code.

3 version of these guidelines was issued in September 1996.

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Currently, CICs are used for purposes beyond those for which they were originally designed.

CICs facilitate competition by enabling callers to use the services of any number of

telecommunications service providers. For example, they enable callers to reach any carrier

(presubscribed or otherwise) from any telephone, by dialing a carrier access code that includes a

CIC.

The number of firms seeking and obtaining CICs provides the most useful information available

on the entry of new firms into the long distance market. This is particularly the case for years

prior to 1986, when the Commission decided that interstate access services should be made

available on a non-discriminatory basis to end users as well as to interexchange carriers (IXCs).

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In addition, the CIC information is current: firms acquiring CICs for the first time are reported

within 30 days.

An IXC or other access customer must have a CIC to purchase Feature Group D or Feature

Group B interconnection access from a local telephone company. Feature Group D, which

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allows a customer of an IXC to place calls on a "1-plus" basis, is the "equal access" capability

deployed by the Bell telephone companies following their divestiture from AT&T. Feature

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Group B differs somewhat from Feature Group D in that an IXC's customer must first dial 950

and then the four-digit CIC to place a call. The total number of CICs assigned thus reflects the

number of firms seeking high-quality interconnection access arrangements with local telephone

companies.

The growth in the number of CICs over time is shown in Table 1. As of March 31, 1997, 882

Feature Group B codes and 1,395 Feature Group D codes had been assigned. The firms holding

Feature Group B codes are listed in Tables 2 and 3; those with Feature Group D codes are listed

in Tables 4 and 5.

A number of firms that are not assigned a CIC may also offer long distance telecommunications

services for sale. Typically, these firms resell the services provided by others. No accurate

count of the number of these carriers is available. Other firms engaged in long distance

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The history of CIC expansion is outlined in the publication, Long Distance Carriers and

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Code Assignments, May 22, 1995, mimeo #53905.

The Industry Carriers Compatibility Forum (ICCF), an organization that develops guidelines

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of number administration, has defined Personal Communication Services as "a set of capabilities

that allows some combination of personal mobility, terminal mobility and service profile

management. It enables each personal communication service user to participate in a

user-defined set of subscribed services, and initiate and/or receive calls on the basis of some

combination of a personal number, terminal number, and a service profile across multiple

networks at any terminal, fixed or mobile, irrespective of geographic location." Personal

Communications Services (PCS) N100 NXX Code Assignment Guidelines, ICCF 93-1130-011,

S.1.1. (Nov. 17, 1993). We note that PCS in the context of 500 service is distinct from the term

PCS that refers to certain types of commercial mobile radio service.

The possible combinations of line number digits, from 0000 to 9999, yield 10,000 possible

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numbers for each office code.

4 expanded to three and to four digits to assure there are enough CICs to meet the demand for

them. As with area code changes, changing the number of digits in CICs requires advance

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planning and may require a transition period. Carriers may have to reprogram and upgrade

network switches. Callers must be educated about the changes, equipment owners may need to

reprogram and upgrade PBS switches, and manufacturers may need to develop new software and

hardware for equipment owners and carriers. The Network Services Division of the

Commission's Common Carrier Bureau addresses these matters.

500 Service

In 1993, a new set of codes for personal communications services was established. Area code

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500 was designated for this purpose. One of the potential uses for 500 codes is that an

individual or business can keep the same phone number (NXX-XXXX) if it moves from its

central office code area (NXX), even to another state. Five hundred codes would thus allow

non-geographic numbering.

Companies seeking to offer 500 service receive office codes, each of which can be used for

10,000 telephone numbers. All 500 calls that are dialed as 1-500-550-XXXX are routed to

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MCI, regardless of the last four digits dialed. Similarly, calls that are dialed as

1-500-288-XXXX are routed to AT&T. Because each of 1,000 office codes can be associated with 10,000

line numbers, there are theoretically 10,000,000 potential 500 numbers. As a practical matter,

however, fewer than 80% of these potential numbers are usable. Telephone numbers that begin

with a 1 or 0, for example, are not used.

Table 6 is a "balance sheet" for the assignment of 500 codes and the types of companies to which

the codes are assigned. Table 7 shows the assignment of codes by quarter. The first 500 codes

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In the Bellcore guidelines for 555 line numbers, the regional numbers are referred to as

"non-10

national" numbers.

This data is available in the publication, Long Distance Carriers and Their Code Assignments,

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October 29, 1993, mimeo #40233.

5 and 9 list the assignment of 500 office codes service providers within area code 500.

555 Line Numbers

The assignment of 555 line numbers differs from that of 500 codes in that 555 represents the

office code (NXX) and remains a constant. The numbers being assigned are the line

numbers--the last four digits of a seven-digit number telephone number. A 555 line number that has been

in use many years is 555-1212, which is used for directory assistance. This particular 555

number will continue to be used for that purpose. Non-communications companies as well as

communications companies can obtain line number assignments for 555 line numbers. Like the

telephone number for directory assistance, these numbers are to be used for informational

purposes.

The 555 line numbers are being assigned on a national or regional basis. A national 555 number

is assigned to an entity for use in most or all of the area codes in the United States, whereas a

regional 555 number is assigned to an entity for use in a specific geographic area (less than 30%

of the area codes or states or provinces). Thus, a regional 555 number may be assigned to

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more than one entity if it is to be used in different geographic regions. A national number

cannot be assigned to more than one entity.

Table 10 is a "balance sheet" containing information on the assignment of 555 line numbers.

Table 11 tracks the assignment of 555 line numbers. The first 555 line numbers were assigned

on May 12, 1994. As of March 31, 1997, 2,535 line numbers (i.e. 555-XXXX) had been

assigned. Tables 12 and 13 show the assignment of telephone numbers with 555 as the first

three digits.

800 and 888 Service

Toll-free 800 and 888 are services for which the called party pays for the call. Prior to 1993,

toll-free 800 calls were routed in a manner similar to that being used for 500 and 900 calls, with

the NXX office code indicating the long distance carrier handling the call. Information is

available (in the same format and sequence as the tables displaying 900 codes) from the FCC

indicating the status of the 800 market as of April 30, 1993; this is the last available data under

the old 800 routing system.

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On May 1, 1993, procedures for routing 800 calls were changed. The first three digits of 800

calls no longer indicate the carrier handling the call. The new system enables customers to

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6 growth of 800 telephone numbers is shown in Table 14. This growth has caused the near

exhaust of 800 numbers. In March 1996, the 888 code was added to support the increase in

demand for toll-free numbers (codes were first assigned in February 1996). The 888 code has

nearly 8 million combinations. Table 15 shows the growth of 888 telephone numbers starting in

1996.

900 Service

900 service is a service for which the calling party is charged for the call at rates different from

those charged for ordinary long distance calls. A common use is the provision of

information-type services such as sports scores, music industry updates, stock quotes, and weather forecasts.

Some companies use 900 numbers for software support -- with callers, in effect, paying a

per-minute consulting fee.

The provision of 900 service typically involves two parties: a carrier to handle the transmission

and an entertainment or information provider. The information provider is not regulated by the

FCC but is regulated by the Federal Trade Commission with respect to advertising, billing 900

services, and the message preamble. The carrier that transmits a 900 call usually handles the

billing and collection as well. Because billing and collection is nonregulated, charges for this

activity are usually covered by contract. The carrier typically charges both a per-minute fee for

the actual transmission of the message plus a share of the gross receipts for handling the billing

and collection.

The assignment of 900 codes is similar in many respects to the assignment and use of 500 codes

discussed above. For example, the assignment of each NXX code represents 10,000 individual

line numbers, and the codes are not transferable among carriers.

Tables 16 through 19 are almost identical in format to the tables presented earlier for 500

service. Table 16 is a "balance sheet" for the assignment of 900 numbers, indicating the number

of codes assigned and the types of carriers to which the codes are assigned. Table 17 tracks the

assignment of codes to potential competitors in the market for 900 services over time. Tables 18

and 19 provide a list of all assigned 900 codes and the firms holding those codes.

Not all of the 900 codes assigned by Bellcore are in use at any particular time. In some cases, a

firm that has acquired a 900 code may not yet have commenced operation. In other cases, firms

may have merged or terminated operations and the numbers have not yet been reassigned.

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7 *

*

This report is available in the Common Carrier Bureau reference room, 2000 M Street, N.W.,

Room 575, Washington, D.C. 20554. The data contained in this report can be obtained [file

name LDC1Q97.ZIP] from the FCC-State Link internet site at http://www.fcc.gov/ccb/stats on

the World Wide Web. The report can also be downloaded from the FCC-State Link computer

bulletin board at (202) 418-0241. Copies of the report may be purchased by calling International

Transcription Services, Inc. (ITS) at (202) 857-3800. For more information, contact Katie

Rangos at (202) 418-0940.

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NUMBER OF NUMBER OF

YEAR QUARTER CICS YEAR QUARTER CICS

ASSIGNED ASSIGNED

1982 FIRST QUARTER 11 1988 FIRST QUARTER 602

SECOND QUARTER 13 SECOND QUARTER 621

THIRD QUARTER 13 THIRD QUARTER 601

FOURTH QUARTER 11 FOURTH QUARTER 639

SECOND QUARTER 86 * SECOND QUARTER 794

1987 FIRST QUARTER 444 SECOND QUARTER 495 THIRD QUARTER 530 FOURTH QUARTER 573

NUMBER OF CARRIER IDENTIFICATION CODES (CICS)

ASSIGNED BY

BELL COMMUNICATIONS RESEARCH

1993 - 1997

YEAR QUARTER FGB FGD 1993 FIRST QUARTER 694 ** 709 SECOND QUARTER 738 746 THIRD QUARTER 739 760 FOURTH QUARTER 753 796 1994 FIRST QUARTER 781 815 SECOND QUARTER 795 845 THIRD QUARTER 805 899*** FOURTH QUARTER 819 947 1995 FIRST QUARTER 829 1,016 SECOND QUARTER 832 1,082 THIRD QUARTER 843 1,146 FOURTH QUARTER 852 1,209 1996 FIRST QUARTER 865 1,253 SECOND QUARTER 876 1,300 THIRD QUARTER 875 1,315 FOURTH QUARTER 878 1,337 1997 FIRST QUARTER 882 1,395

* CONVERSION FROM 2-DIGIT CODES TO 3-DIGIT CODES. ** CONVERSION FROM 3-DIGIT CODES TO 4-DIGIT CODES. *** INCLUDES BOTH 3-DIGIT CODES AND 4-DIGIT CODES.

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LIST OF FGB CIC CODE ASSIGNMENTS

SORTED BY CIC CODE

(AS OF MARCH 31, 1997)

CODE ASSIGNED TO CODE ASSIGNED TO

0002 WORLDCOM, INC. 0322 AMERICAN SHARECOM, INC. 0004 ATX TELECOMMUNICATIONS SERVICES 0327 ECI COMMUNICATIONS 0005 MACY'S OF CALIFORNIA 0330 TEL-SHARE

0013 ACCESS SERVICES dba PACIFIC NW TELECOM 0338 MIDCO COMMUNICATIONS

0015 HAWAIIAN TELEPHONE COMPANY 0339 COMMUNICATION CABLE LAYING CO., INC. 0016 TMC LONG DISTANCE dba CHERRY COMMUNICATIONS, INC. 0340 TELECOMM. TECHNOLOGIES, INC. (TEL-TECH) 0017 NCHE TELECOMMUNICATIONS NETWORK, INC. 0349 COMMUNICATION CABLE LAYING CO., INC. 0019 TMC LONG DISTANCE dba CHERRY COMMUNICATIONS, INC. 0356 EASTMAN KODAK COMPANY

0025 INTER CONTINENTAL TELEPHONE 0357 MANITOWOC LONG DISTANCE SERVICE 0028 AMERICAN LONG DISTANCE CORPORATION 0358 LCI INTERNATIONAL TELECOM CORP. 0030 US LONG DISTANCE 0366 AMERICAN TELCO, INC.

0035 LONG DISTANCE AMERICA 0367 WORLDCOM, INC.

0045 PSA, INC. 0370 AMERICAN NETWORK EXCHANGE INC.

0048 ETSC 0373 ECONO-LINE WACO

0049 HEDGES & ASSOCIATES 0375 AT&T EASYLINK SERVICES

0056 SP TELECOM 0378 TEL SERV

0057 NATIONWIDE LONG DISTANCE, INC. 0380 TELESERV CORPORATION 0060 ECONOMY TELEPHONE, INC. 0384 VOICECOM SYSTEMS, INC. 0062 KENTUCKY TELEPHONE CORP. 0390 ONE-2-ONE COMMUNICATIONS 0065 ISACOMM, INC. [SPRINT] 0393 INTERMEDIA COMMUNICATIONS, INC. 0067 NATIONAL TELEPHONE COMMUNICATIONS, INC. 0396 U.S. TELE-COMM, INC.

0070 US LONG DISTANCE 0402 INTEGRETEL, INC.

0071 DIGITAL NETWORK, INC. 0409 TELEVOX PUBLIC COMMUNICATIONS, INC. 0074 VALU-LINE OF ANGLETON 0410 CALL AMERICA/PALM DESERT

0078 US LONG DISTANCE 0420 PHOENIX NETWORK

0080 WORLDCOM, INC. 0421 WORLDCOM, INC.

0083 TELCO 0441 ESCONDIDO TELEPHONE COMPANY

0085 WESTEL, INC. 0442 WORLDCOM, INC.

0086 FRONTIER COMMUNICATIONS OF THE MID ATLANTIC, INC. 0446 WORLDCOM, INC. 0089 HARBOR BAY TELECOMMUNICATIONS 0461 TTE OF CHARLESTON 0093 TCA COMMUNICATIONS 0462 TMC OF LEXINGTON 0110 TANDEM ACCESS FOR DATABASE QUERY 0469 GMW COMPANY 0136 EASTERN TELECOM INTERNATIONAL 0470 COSHOCTON L.D.S.

0139 ASCENDING TECHNOLOGIES 0475 FIBERFONE OF FLORIDA, INC. 0171 SUPERTEL COMMUNICATIONS, INC. 0480 STAT COMMUNICATIONS 0189 STATE OF TEXAS - GSC 0486 EXECULINES OF SACRAMENTO 0190 BCS COMMUNICATIONS 0487 CAMBRIDGE COMMUNICATIONS 0191 TELEPHONE SUPPORT SYSTEMS, INC. 0488 WORLDCOM, INC.

0197 FLEABUSTERS 0489 TEL-OPTIC, INC. dba UNIVERSAL NETWORK SVCS. (UNI-NET) 0200 US WATS 0490 PHOENIX COMMUNICATIONS GROUP, INC.

0202 EXECULINES OF THE NORTHWEST, INC. 0497 ECON-A-CALL INC. OF HAYS

0204 UNITED TELEPHONE LONG DISTANCE 0499 TELEPHONE ASSOC. dba THIEF RIVER FALLLS LD 0207 SHENANDOAH LONG DISTANCE COMPANY 0505 CENTURY TELECOMMUNICATIONS, INC. 0210 STARLINE, INC. 0511 EXECULINES OF SACRAMENTO 0211 FRONTIER COMMUNICATIONS INTERNATIONAL, INC. 0517 MONTANA LONG DISTANCE, INC. 0214 TCA COMMUNICATIONS 0519 MIDCOM, INC.

0218 KRISTIN ENTERPRISES dba TEL-CENTRAL 0521 ROANOKE & BOTETOURT TELEPHONE CO. 0220 TELECOM*USA [MCI] 0522 TELEFIND CORPORATION

0221 CAPITAL TELECOMMUNICATIONS, INC. 0527 INDEPENDENCE TELEPHONE CO. 0223 CABLE & WIRELESS COMMUNICATIONS, INC. (TDX) 0529 TELECOM WEST

0228 USLINK LONG DISTANCE 0535 WORLDCOM, INC.

0229 U S COMNET 0537 LCI INTERNATIONAL

0244 PHOENIX NETWORK 0542 UNITED STATES CELLULAR CORPORATION 0260 ADVANCED COMMUNICATIONS SYSTEMS INC. 0551 ACCESS-PLUS, INC.

0264 MIIC dba POLARIS TELCOM 0552 LAKE STATES COMMUNICATIONS 0266 COMSYSTEMS NETWORK SERVICES 0556 US LONG DISTANCE

0268 THE COMMUNIGROUP 0558 MIDCOM OF ARIZONA, INC.

0271 U.S. NETWORK 0561 LCT LONG DISTANCE

0272 BELL ATLANTIC COMMUNICATIONS, INC. 0566 CABLE & WIRELESS COMMUNICATIONS, INC. (TDX) 0275 SWIFF TRAIN COMMUNICATIONS 0572 PAC TEL PAGING, A PACIFIC TELESIS CO. 0277 FIRST CHOICE LONG DISTANCE, INC. 0578 TTI TELECOMMUNICATIONS, INC. 0282 ACTION TELCOM CO. 0579 ALIANT SYSTEMS, INC. 0289 VACATION VILLAGES OF AMERICA, INC. 0589 WORLDCOM, INC. 0297 PACIFIC GATEWAY EXCHANGE 0592 ESS VENTURES, INC.

0298 U.S. NET, INC. 0596 INTERNET, INC.

0300 TEL-OPTIC, INC. dba UNIVERSAL NETWORK SVCS. (UNI-NET) 0607 LONG DISTANCE COMMUNICATIONS 0302 AUSTIN BESTLINE 0608 MODULAR DATA, INC.

0306 COLORADO RIVER COMMUNICATIONS 0616 INTER COMM. MANAGEMENT NETWORK

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0624 MASTERCARD INTERNATIONAL 0870 BLUE RIDGE TELEPHONE 0627 NATIONWIDE EMERGENCY TELECOMM. SYSTEM 0872 SPRINT

0634 ECONO-LINE MIDLAND 0878 VALLEY STAR-TEL 0637 FOX COMMUNICATIONS CORP. 0879 US COMMUNICATIONS,INC. 0638 NORTHWEST TELECOM, LTD. 0883 WORLDCOM, INC. 0639 ARCADA COMMUNICATIONS 0884 WORLDCOM, INC.

0642 R,D,&J COMMUNICATIONS MGMT., INC. 0885 THE COMMUNIGROUP OF KC 0652 BELL ATLANTIC COMMUNICATIONS, INC. 0886 ALIANT SYSTEMS, INC.

0654 CINCINNATI BELL LONG DISTANCE 0887 TELEMANAGEMENT CONSULTANTS CORPORATION 0657 NATIONAL TELECOM. OF FLORIDA 0888 MCI

0658 OCI 0899 TELEPHONE EXPRESS

0661 COASTAL TELEPHONE COMPANY 0905 PIZZA HUT, INC. 0663 AMERICAN TELCO NETWORK SERVICES INC. 0908 NTC, INC.

0664 INTERMOUNTAIN DIGITAL NETWORK 0909 CHADWICK TELEPHONE

0669 VALU-LINE OF AMARILLO 0912 MRC TELECOMMUNICATIONS, INC. 0675 COMMUNICATION SERVICES OF COLORADO 0913 ATS COMMUNICATIONS, INC.

0679 FEIST LONG DISTANCE 0914 CENTURY TELECOMMUNICATIONS, INC. 0684 LCT LONG DISTANCE 0922 FEB CORPORATION

0687 NTS COMMUNICATIONS, INC. 0927 ADVANCED RADIO COMMUNICATIONS SYSTEMS

0693 DELUXE DATA SYSTEMS 0929 STENOCALL

0695 OPTICALL COMMUNICATIONS SERVICES 0931 L.D. NETWORK, INC.

0698 NYNEX 0937 ACCESS LONG DISTANCE

0699 TEL-COM, INC. 0945 TEL-OPTIC, INC. dba UNIVERSAL NETWORK SVCS. (UNI-NET) 0700 TEL AMERICA 0950 BENEFICIAL DATA PROCESSING CORP.

0705 EXECULINES OF THE NORTHWEST, INC. 0951 WORLDCOM, INC.

0709 TEL AMERICA 0952 WILKES LONG DISTANCE SERVICE 0714 PHONELINK, INC. 0956 BANK OF AMERICA, NT & SA 0727 SWITCH 2000, INC. 0959 AMRIGON ENTERPRISES, INC. 0733 WORLDCOM, INC. 0961 TELEPHONE SYSTEMS OF GEORGIA

0737 WORLDCOM, INC. 0965 HOGAN COMMUNICATIONS

0738 WORLDCOM, INC. 0966 COASTAL AUTOMATED COMMUNICATIONS CORP.

0740 PUBLIC SWITCH CORP. 0985 FONOROLA

0742 WORLDCOM, INC. 0988 AT&T EASYLINK SERVICES 0746 NATIONAL TELEPHONE EXCHANGE (PA) 0989 KRB TELECOM

0752 EXCEL TELECOMMUNICATIONS, INC. 0990 VISA USA INC.

0756 US LONG DISTANCE 0996 MIDCO COMMUNICATIONS 0757 PACE LONG DISTANCE SERVICE 1001 WORLDCOM, INC.

0759 TELENET COMM. CORP., (SPRINT) 1003 FRONTIER COMMUNICATIONS INTERNATIONAL, INC.

0760 GTE TELECOM 1006 WORLDCOM, INC.

0761 MELLON BANK N.A. 1007 TELAMARKETING COMMUNICATIONS, INC. 0762 STATE OF CALIFORNIA - CALNET 1008 WORLDCOM, INC.

0765 NETWORK LONG DISTANCE 1009 TWT-HEARTLINE

0766 YAVAPAI TELEPHONE EXCHANGE 1010 FLEX COMMUNICATIONS SYSTEM

0770 VISA USA INC. 1011 WORLDCOM, INC.

0773 AMERICAN L.D. OPERATOR SERVICE CO. 1012 LITEL/LCI INTERNATIONAL 0774 CITYNET COMMUNICATIONS, INC. 1014 MARATHON COMMUNICATIONS

0777 SPRINT 1018 SHARED USE NETWORK

0787 STAR TEL OF ABILENE 1021 WORLDCOM, INC.

0788 C-COM 1022 MCI

0789 WORLDCOM, INC. 1026 NET-TEL CORPORATION

0794 AMERITEL 1027 WORLDCOM, INC.

0805 OCI 1033 SPRINT

0806 NACT 1036 LONG DISTANCE SAVERS

0823 UNITED BANK OF DENVER 1037 BN1 TELECOMMUNICATIONS, INC. 0825 FIBERLINE NETWORK COMMUNICATIONS L.P. 1039 AMERISYSTEMS, INC.

0829 TELEPHONE ASSOC. LONG DISTANCE SVCS. 1040 U.S. SIGNAL CORPORATION 0832 TELECOM*USA [MCI] 1042 WORLDCOM, INC.

0835 TELECOM*USA [MCI] 1044 ALLNET COMM. SVC. INC. [LDX,LEXITEL] 0837 TELEPHONE ASSOC. LONG DISTANCE SVCS. 1046 CAM-NET, INC.

0839 CABLE & WIRELESS COMMUNICATIONS, INC. (TDX) 1050 WORLDCOM, INC.

0843 WORLDCOM, INC. 1052 WEST COAST TELECOMMUNICATIONS, INC. 0853 DIGITAL NETWORK, INC. 1053 WORLDCOM, INC.

0855 UNION TELEPHONE COMPANY 1054 EASTERN TELEPHONE SYSTEMS, INC. 0859 VALU-LINE OF LOUISIANA, INC. 1055 WORLDCOM, INC.

0861 NATIONAL PAYPHONE SUPPLY dba RATE SAVER 1058 FRONTIER COMMUNICATIONS OF THE GREAT LAKES, INC. 0867 BITTEL TELECOMMUNICATIONS CORP. 1061 AMERICAN COMMUNICATIONS NETWORK

(13)

LIST OF FGB CIC CODE ASSIGNMENTS--CONTINUED

SORTED BY CIC CODE

(AS OF MARCH 31, 1997)

1066 ALLNET [LEXITEL/LDX] 1274 WORLDCOM, INC.

1069 WILLAMETTE VALLEY TELCOM SERVICES 1279 ASSOCIATED TELENET INC./ A CTI COMPANY

1072 NBD BANK, NA 1281 BUYPASS CORPORATION

1073 COMMUNICATIONS OPTIONS, INC. 1283 IOWA COMMUNICATIONS NETWORK 1075 ALLCOMM LONG DISTANCE, INC. 1285 CHECKRITE

1076 INTERNATIONAL TELEMEDIA ASSOCIATES, INC. 1286 CINCINNATI BELL LONG DISTANCE 1077 GENERAL COMMUNICATION, INC. 1287 CALIFORNIA STATE LOTTERY 1082 WORLDCOM, INC. 1288 AT&T COMMUNICATIONS

1087 TELECOM*USA [MCI] 1291 CALL SAVERS, INC.

1088 SBS/MCI 1292 CARD ESTABLISHMENT SERVICES

1091 CALL TECHNOLOGY CORP. OF PHILADELPHIA 1293 CINCINNATI BELL LONG DISTANCE 1092 TELECOM*USA [MCI] 1295 GLENS FALLS LONG DISTANCE SERVICE

1094 MAG CARD 1296 TELNEX, INC.

1096 FLEX COMMUNICATIONS SYSTEM 1299 LECNET 1097 TRESCOM PUERTO RICO 1305 MOTOROLA INC. 1098 NETECH COMM., A US WEST COMPANY 1311 WORLDCOM, INC. 1099 PAC-WEST TELECOMM, INC. dba AMERICALL 1312 WORLDCOM, INC. 1120 TRT TELECOMMUNICATIONS CORPORATION 1313 STAR TEL, INC.

1122 MCI 1314 AT&T WIRELESS SERVICES, INC.

1125 ATLANTIC TELEPHONE COMPANY, INC. 1315 WORLDCOM, INC.

1133 MCI 1318 LONG DISTANCE SAVERS

1141 IFC COMMUNICATIONS 1319 CONQUEST

1148 ALLEGAN CELLULAR L.P. 1321 TELECOM*USA [MCI]

1149 TELEPHONE TOWNHALL MEETINGS, INC. 1324 FIRST COMMUNICATIONS, INC. (FDR)

1177 SPRINT 1325 ECONO CALL LONG DISTANCE SERVICES

1178 TEAM ELECTRONICS 1326 DIAL AMERICA, INC.

1183 MCI 1331 TEXUSTEL, INC.

1188 MCI 1332 NORTHLAND TELEPHONE SYSTEMS LTD.

1195 GASCARD 1333 SPRINT

1203 CYPRESS TELECOMMUNICATIONS CORP. (CYTEL) 1335 TOUCH AMERICA, INC.

1206 FIRST OF AMERICA BANK SE MICHIGAN N.A. 1336 COMMONWEALTH LONG DISTANCE CO. 1208 WORLDCOM, INC. 1337 FIRST DATA RESOURCES, INC. (FST) 1212 WORLDCOM, INC. 1341 NATIONAL TELE-SAV, INC.

1213 LONG DISTANCE TELEPHONE SAVERS 1342 EQUITABLE GAS

1215 STAR TEL OF ABILENE 1344 CALL AMERICA BUSINESS COMM. CORP. 1216 PENNY FONE 1345 ACC LONG DISTANCE CORPORATION 1217 WORLDCOM, INC. 1348 VALU-LINE OF TRI-CITIES

1219 CALL USA CORP. 1350 DIAL-NET, INC.

1222 MCI 1351 CALL AMERICA OF RIVERSIDE

1224 TELECOM*USA [MCI] 1352 STANDARD TELCOM, INC. 1225 IOWA NETWORK SERVICES, INC. 1353 WORLDCOM, INC. 1226 ONE CALL COMMUNICATIONS 1355 US LINK LONG DISTANCE 1227 PEOPLES TELEPHONE COMPANY, INC. 1359 OFF CAMPUS COMMUNICATIONS 1231 AMERICAN SHARECOM, INC. 1360 TOUCH AMERICA, INC.

1232 FRONTIER COMMUNICATIONS OF THE GREAT LAKES, INC. 1361 DAKOTA COOPERATIVE TELECOMM., INC. 1233 DELTACOM LONG DISTANCE SERVICES 1362 AMERISYSTEMS, INC.

1234 ACC LONG DISTANCE CORPORATION 1363 TEL-TOLL dba ECON-O-DIAL OF BISHOP 1235 AUTOMATED TELEPHONE 1372 WORLDCOM, INC.

1236 LITEL/LCI INTERNATIONAL 1377 FONES WEST DIGITAL SYSTEMS 1237 WORLDCOM, INC. 1379 MSI COMMUNICATIONS, INC. 1239 CONSOLIDATED COMMUNICATIONS CORPORATION 1382 LONG DISTANCE MANAGEMENT, INC. 1240 DELTACOM, INC. 1383 CARIBBEAN TELEPHONE & TELEGRAPH, INC. 1241 AMERICAN LONG LINES 1385 THE SWITCHBOARD

1243 BEEHIVE TELEPHONE CO., INC. 1391 OMNICALL COMMUNICATIONS CORPORATION 1245 TACONIC LONG DISTANCE SERVICE, CORP. 1392 MOBIL OIL CREDIT CORP.

1246 WORLDCOM, INC. 1394 TRESCOM U.S.A., INC./TRESCOM CARIBBEAN 1249 PSP MARKETING GROUP, INC. 1399 CENTRAL NEW YORK TALK-TRANSIT 1250 DIAL-NET, INC. 1400 AMERICAN SHARECOM, INC. 1251 AMERICAN INT'L. TELECOMMUNICATIONS 1401 NATIONAL TELESERVICE 1252 LONG DISTANCE/USA [SPRINT] 1406 WORLDCOM, INC. 1253 LITEL/LCI INTERNATIONAL 1407 WORLDCOM, INC.

1257 CONQUEST 1411 AMERICAN EXPRESS TRAVEL RELATED SVCS. 1261 PAC-WEST TELECOMM, INC. dba AMERICALL 1412 PENN TELECOM, INC.

1262 PAC-WEST TELECOMM, INC. dba AMERICALL 1419 ASSOCIATED GROCERS, INC. 1267 WORLDCOM, INC. 1425 CAPITAL NETWORK SYSTEMS INC.

1268 THE COMMUNIGROUP OF KC 1426 IBM

(14)

1430 DOMINO'S PIZZA INC. 1583 GST NET, INC.

1431 WESTERN TELENET, INC. 1586 DIGITAL NETWORK, INC.

1432 LCI INTERNATIONAL 1587 TEL-OPTIC, INC. dba UNIVERSAL NETWORK SVCS. (UNI-NET) 1434 GENERAL ELECTRIC INFORMATION SERVICES 1591 SANTA FE RAILWAY

1435 EXTELCOM dba EXPRESS TEL 1595 VARTEC TELECOM, INC.

1436 ALARM CENTER, INC. 1598 TRANSACTION NETWORK SERVICES, INC. 1437 AMERICAN NATIONAL TELCOM 1599 TEXAS LONG DISTANCE CONROE

1439 STAR TEL, INC. 1600 TELEVALUE CORP. dba ECON-O-DIAL RIDGECREST 1440 MFS INTELENET, INC. 1601 TEL-OPTIC, INC. dba UNIVERSAL NETWORK SVCS. (UNI-NET) 1443 WESTERN OKLAHOMA INFORMATION SYSTEMS 1602 COMLINK USA

1444 ALLNET COMM. SVC. INC. [LDX,LEXITEL] 1604 SB COMMUNICATIONS, INC. 1447 FAXNET CORPORATION 1611 COMCENTRAL, INC.

1450 WORLDCOM, INC. 1613 AN-SER SERVICES (FROMM SERVICES, INC.) 1451 LCI INTERNATIONAL 1614 CINCINNATI BELL LONG DISTANCE 1452 LCI INTERNATIONAL 1615 C.P.I. dba GULF STATES COMMUNICATIONS 1453 WORLDCOM, INC. 1619 COLORADO RIVER COMMUNICATIONS

1456 WORLDCOM, INC. 1620 TELEMONEY SERVICES, A FIRST DATA CORPORATION 1457 TRACE COMMUNICATIONS 1621 MID TNC dba MIDCOM COMMUNICATIONS, INC. 1459 WESTCOM LONG DISTANCE 1622 MEDE AMERICA

1460 INDEPENDENT NETWORK SERVICES 1623 NATIONAL TELESERVICE

1463 INTELENET COMMISSION 1628 LDDS

1464 WORLDCOM, INC. 1629 COACHELLA VALLEY COMM., dba INTEG. OPER. SVCS.

1465 INTELCO 1631 LONG DISTANCE OF MICHIGAN

1468 ITC NETWORKS OF UTAH 1632 NATIONAL DATA CORPORATION 1472 FIRST CHOICE LONG DISTANCE, INC. 1633 EXECULINES OF SACRAMENTO, INC. 1476 TELECOMPUTE CORPORATION 1635 METRO TELEPHONE INC.

1477 POPP TELECOM 1641 SOURIS RIVER TELECOMMUNICATIONS COMPANY 1478 ITC NETWORKS OF UTAH 1644 OHIO DEPARTMENT OF ADMINISTRATIVE SVCS. 1482 TELE-SYS, INC. 1645 AMERICAN COMMUNICATIONS TECHNOLOGY, INC. 1483 INDEPENDENT LONG DISTANCE 1646 CONTACT AMERICA, INC.

1484 COMMUNITY LONG DISTANCE INC. 1648 MID MCND dba MIDCOM COMMUNICATIONS, INC.

1485 TELTRUST, INC. 1651 O.L.C. COMPANY

1491 NORTHERN ARIZONA COMMUNICATIONS CORP. 1655 MERCHANT-LINK, INC. 1492 CARD ESTABLISHMENT SERVICES 1661 COASTAL TELEPHONE CO. 1493 EXTELCOM dba EXPRESS TEL 1662 RESOURCE TECHNOLOGY 1494 EXTELCOM dba EXPRESS TEL 1666 SYSTEMS 1000

1500 FRONTIER COMMUNICATIONS OF THE GREAT LAKES, INC. 1667 COMMUNICATIONS INC., dba ECI 1502 COMMUNICATION TELESYSTEMS INTL. (CTS) 1670 CAMERON LONG DISTANCE 1506 ADP AUTONET 1673 TELEPHONE CONNECTIONS, INC. 1507 LEE HARBOR HOMES 1674 MSI COMMUNICATIONS, INC. 1510 INNOVATIVE COMMUNICATIONS, INC. 1676 PUGET SOUND BANK 1514 ANNE ARUNDEL COUNTY 1678 VALU-LINE OF KANSAS, INC. 1515 FRONTIER COMMUNICATIONS OF NEW ENGLAND, INC. 1680 MIDWEST TELEPHONE SERVICE, INC.

1518 TELECON COMMUNICATIONS CORPORATION 1682 STATE OF MARYLAND (DEPT OF GEN.SERVICES) 1520 TEL-SPAN COMMUNICATIONS, INC. 1685 INTL.800 TELECOM dba TELECALL LONG DIST. 1522 TELAPEX LONG DISTANCE, INC. 1686 AT&T CANADA LONG DISTANCE SERVICES CO. 1532 WORLDCOM, INC. 1689 TELEMANAGEMENT CONSULTANTS CORPORATION 1533 LONG DISTANCE DISCOUNT, INC. 1690 CORPORATE TELEMANAGEMENT GROUP 1536 LONG DISTANCE MANAGEMENT 1692 CARD ESTABLISHMENT SERVICES 1539 ALLNET [LEXITEL/LDX] 1694 FRONTIER LONG DISTANCE AMERICA 1544 UNITED TELEPHONE CO. dba TELAMERICA L.D. 1696 JC PENNEY BUSINESS SERVICES

1545 KEYSTONE TELECOM, INC. 1701 WESTERN TELECOMMUNICATION, INC. (WTCI) 1546 WORLDCOM, INC. 1703 KEYSTONE TELECOMMUNICATIONS INC. 1547 TELEFONICA LARGA DISTANCIA DE P.R., INC. 1704 ARTHUR ANDERSON & CO.

1549 NATIONAL BRANDS, INC. 1706 ICON COMMUNICATIONS CORPORATION 1550 CENTURY LONG DISTANCE 1707 TELVUE CORPORATION

1554 CELLTOLL CORPORATION 1708 LIGHT LINK, INC. dba TAYLOR COMM. GRP.

1555 WORLDCOM, INC. 1712 WCS OPERATORS

1560 TCI COMMUNICATIONS, INC. . 1716 COMPUSERVE

1562 LCI 1717 PASS WORD, INC.

1563 LINKUSA CORPORATION 1718 TCG

1564 LONG DISTANCE OHIO, INC. 1720 SILVERADO COMMUNICATIONS 1565 METRO ONE DIRECT 1722 HI-PLAINS NTS COMMUNICATIONS 1567 ADVANCED MKG. SVCS., dba DIAL ANYWHERE 1724 WORLDCOM, INC.

1568 US COMM. INC, dba SOUTHWEST L.D.N, INC. 1725 CONSOLIDATED NETWORK, INC.

1569 WEST COAST TELECOMMUNICATIONS, INC. 1728 GARDEN STATE LONG DISTANCE TELEPHONE 1573 AMERICAN TELECOMMUNICATIONS HOLDING LTD. 1729 TEL AMERICA

1581 NORCOMM 1731 TELESCAN, INC.

(15)

LIST OF FGB CIC CODE ASSIGNMENTS--CONTINUED

SORTED BY CIC CODE

(AS OF MARCH 31, 1997)

1739 FLAT RATE COMMUNICATIONS 1932 MID-TEL L.D. OF MINOT

1745 TELEPHONE ELECTRONICS NETWORK, LTD. 1933 NORTH AMERICAN COMMUNICATIONS, INC. 1750 VC TELECOMMUNICATION SYSTEMS 1935 FIRST CHOICE LONG DISTANCE, INC.

1754 ADVANTIS 1939 VISTA-UNITED TELECOMMUNICATIONS

1755 ADVANTIS 1941 DATA COM

1764 ROANOKE TELEPHONE COMPANY 1944 WYNN-HILL NETWORK

1768 DIGINET COMMUNICATIONS 1946 WESTINGHOUSE COMMUNICATIONS 1769 STATE OF NEW YORK 1947 ITI INCORPORATED

1771 TELECOM*USA [MCI] 1955 UNITED COMMUNICATIONS, INC.

1772 ADVANTIS 1957 TEL-OPTIC, INC. dba UNIVERSAL NETWORK SVCS. (UNI-NET) 1779 PEOPLES PHONE COMPANY 1962 GULF LONG DISTANCE, INC.

1780 MATRIX TELECOM 1963 CAPITAL TELECOMMUNICATIONS, INC. 1783 VERTELCO SYSTEMS 1964 AMERITEL LONG DISTANCE FOR LESS 1784 SUNTEL NETWORK, INC. 1972 DIGITAL NETWORK, INC.

1786 WORLDCOM, INC. 1973 TEL-A-SAVE COMMUNICATIONS SYSTEMS, LTD. 1791 INFOCOM INTERNATIONAL, INC. 1975 VARTEC NATIONAL, INC.

1793 RESPONSE TELCOM, L.P. 1977 TELEPHONE COMMUNICATIONS CORPORATION 1798 THE PAY TELEPHONE COMPANY 1978 NETWORK BILLING & COLLECTION, INC. (NBC) 1799 SYMTECH COMMUNICATIONS SERVICES 1979 VORTEL COMMUNICATIONS, INC.

1801 WORLDCOM, INC. 1980 MIDWEST TELECOM

1802 ELECTRIC LIGHTWAVE, INC. 1982 WESTERN TELECOMMUNICATION, INC. (WTCI) 1807 SOUTH CAROLINA NETWORK, INC. 1983 STAR TEL OF VICTORIA, INC.

1808 EASTERN TELECOM GROUP 1984 STAR TEL TRANSMISSION CO., INC.

1809 ENVOY 1986 MCI

1811 VARTEC TELECOM, INC. 1991 ACCESS LONG DISTANCE

1812 SOUTHLAND CABLEVISION 1992 A.B.E. OF ALABAMA, INC. dba ECONOLINE 1816 MID-TEL L.D,. INC. OF WILLISTON 1993 SOUTHWEST UNITED COMMUNICATION, INC. 1819 HUB DISTRIBUTING, INC. 1994 TOUCH AMERICA, INC.

1820 BIZTEL LTD. 1997 GAS COMPANY OF NEW MEXICO

1821 BT NORTH AMERICA, INC. 1998 THE COMMUNIGROUP OF KC 1822 PROFESSIONAL NETWORKS MANAGEMENT, INC. 1999 WORLDCOM, INC.

1826 MCI 5008 US ONE COMMUNICATIONS CORP.

1827 TCS NETWORK SERVICES 5010 PHOENIX NETWORK

1828 TENCOM 5011 PHOENIX NETWORK

1830 PUBLIC SERVICE COMPANY OF NM 5012 ARRIVA COMMUNICATIONS, INC. 1831 EXECULINES OF SACRAMENTO 5013 LANSER TELECOM, INC. 1833 BUSINESS TELECOM, INC. 5025 AMERITECH

1836 GENERAL SERVICES ADMINISTRATION 5031 ARC NETWORKS

1841 FIRST FINANCIAL MANAGEMENT CORP. 5032 VALULINE LONG DISTANCE

1846 WORLDCOM, INC. 5035 COUNTY OF MONTGOMERY COMMUNICATIONS DIV. 1848 TRESCOM U.S.A, INC. 5036 MERCHANT-LINK, INC.

1850 DIGITEL 5037 MERCHANT-LINK, INC.

1852 TELECOM*USA [MCI] 5038 MERCHANT LINK, INC. 1857 TELECOM*USA [MCI] 5039 MERCHANT LINK, INC. 1858 AT&T CANADA LONG DISTANCE SERVICES CO. 5047 NYNEX

1860 METRO TELECOMM.SVCS., INC. dba METROCOMM 5048 NYNEX

1862 WORLDCOM, INC. 5050 AMERITECH SERVICES

1864 TRANSNET 5051 ARKANSAS BLUE CROSS BLUE SHIELD

1865 EXPRESS COMMUNICATIONS, INC. 5052 ARKANSAS BLUE CROSS BLUE SHIELD 1869 AT&T CANADA LONG DISTANCE SERVICES CO. 5054 USTEL

1871 LOYD COMM. dba COMTEL/HOT SPRINGS 5061 BELLSOUTH BUSINESS SYSTEMS 1873 ONE STAR LONG DISTANCE 5062 BELLSOUTH BUSINESS SYSTEMS 1874 WORLDCOM, INC. 5063 BELLSOUTH BUSINESS SYSTEMS

1875 U.S. ORDER 5064 INTERNET, INC.

1876 TELECOM*USA [MCI] 5065 INTERNET, INC. 1880 ONE CALL COMMUNICATIONS 5067 RCX, INC.

1881 COASTAL TELEPHONE COMPANY 5068 APPLIED SIGNAL CORPORATION

1882 TUCK DATA COMMUNICATIONS 5070 SALT LAKE TEL-A-SYS. C/O THE TANNER GRP. 1890 NORTH COUNTY COMMUNICATIONS CORP. 5071 SALT LAKE TEL-A-SYS. C/O THE TANNER GRP. 1891 OPERATOR SERVICE COMPANY 5075 ROCKEFELLER GROUP TELECOMM. SVCS. 1895 WORLDCOM, INC. 5079 JC PENNEY BUSINESS SERVICES

1897 ITC NETWORKS OF UTAH 5082 UNITED TELEMANAGEMENT SERVICES, INC.

1898 SBS/MCI 5083 ENVOY CORPORATION

1900 TELECOM*USA [MCI] 5085 UNITED REFINING COMPANY 1902 COAST TO COAST TELECOMMUNICATIONS 5089 ENVOY CORPORATION

1910 WORLDCOM, INC. 5098 B.P. OIL COMPANY

1915 TELE TECH, INC. 5101 WESTINGHOUSE COMMUNICATIONS 1918 WORLDCOM, INC. 5102 WESTINGHOUSE COMMUNICATIONS 1919 TEL NET INC. 5103 TELEPHONE BILLING SERVICE

1921 WORLDCOM, INC. 5104 AAA TELEPHONE & COMMUNICATIONS INC. 1930 PILGRIM TELEPHONE INC. 5105 PUBLIC SERVICE COMPANY OF NM

(16)

5106 NEW YORK LOTTERY 5413 ROCKY MTN. HOSP dba BLUE CROSS OF CO

5110 NYNEX 5419 H.G. TELECOM, INC.

5111 FIBERNET TELEMANAGEMENT, INC. 5424 INTELLICALL

5113 STATE OF CAL. HEALTH AND WELFARE AGENCY DATA CENTER 5432 EXCEL TELECOMMUNICATIONS, INC.

5115 BROOKS FIBER COMMUNICATIONS 5438 LERMER OVERSEAS TELECOMMUNICATIONS, INC. 5119 NEXTLINK 5446 OHIO DEPARTMENT OF ADMINISTRATIVE SVCS. 5121 ONE-2-ONE COMMUNICATIONS 5454 QUESTAR INFOCOMM INCORPORATED 5123 U S WEST COMMUNICATIONS 5465 FEDERAL TRANSTEL, INC

5128 TMC WORLDWIDE, INC. 5468 MARYLAND STATE GOVERNMENT 5131 PACIFIC TELECOM, INC. (PTI) 5475 FIRSTEL

5136 COASTAL LONG DISTANCE SERVICES, INC. 5477 CITILINK OF UT, L.L.C.

5151 CELLULAR ONE WASHINGTON/BALTIMORE 5478 BELLSOUTH TELECOMMUNICATIONS 5163 AMERICAN NORTEL COMM. INC. 5483 IT&E OVERSEAS, INC.

5171 BUYPASS CORPORATION 5484 HORIZON TELECOMMUNICATIONS, INC. 5173 FIRST DATA RESOURCES, INC. (FST) 5500 ESS VENTURES, INC.

5174 SOUTHEAST SWITCH 5507 FONOROLA

5175 GROCERS SUPPLY COMPANY, INC. 5511 IT&E OVERSEAS, INC. 5180 FIRST NATIONAL BANK OF MARYLAND 5522 IT&E OVERSEAS, INC. 5181 FIRST NATIONAL BANK OF MARYLAND 5523 VALUE TEL

5182 FIRST NATIONAL BANK OF MARYLAND 5526 POKA LAMBRO TELECOMMUNICATIONS, INC. 5183 FIRST NATIONAL BANK OF MARYLAND 5535 LAKEDALE LINK, INC.

5184 FIRST NATIONAL BANK OF MARYLAND 5545 FIRST FINANCIAL MANAGEMENT CORP. 5185 USA PAGING 5547 TELEFONICA LARGA DISTANCIA DE P.R., INC. 5186 GLENS FALLS HOSPITAL 5555 AMERITECH SERVICES

5190 RETAIL DATA NETWORKS (RDN) 5556 BAY SPRINGS LONG DISTANCE 5191 RETAIL DATA NETWORKS (RDN) 5557 DAKOTA TELECOM, INC. (DTI)

5192 RETAIL DATA NETWORKS (RDN) 5559 COOPERATIVE COMMUNICATIONS, INC. 5193 RETAIL DATA NETWORKS (RDN) 5560 MELLON BANK N.A.

5194 RETAIL DATA NETWORKS (RDN) 5566 IT&E OVERSEAS, INC. 5201 WESTINGHOUSE COMMUNICATIONS 5577 NETWORK CARRIER SERVICES 5202 WESTINGHOUSE COMMUNICATIONS 5587 MELLON BANK N.A.

5210 NYNEX 5588 IT&E OVERSEAS, INC.

5213 TEXACO REFINING AND MARKETING, INC. 5599 INTELCOM GROUP (USA), INC. 5222 FIRST FINANCIAL MANAGEMENT CORP. 5600 ESCONDIDO TELEPHONE COMPANY 5224 ADVANTAGE COMMUNICATIONS GROUP, INC. 5601 MISSOURI LOTTERY

5225 TRANSACTION NETWORK SERVICES, INC. 5607 ONE-2-ONE COMMUNICATIONS

5226 SUPERTEL COMMUNICATIONS, INC. 5608 THE LONG DISTANCE PARTNERSHIP, L.P. 5227 SUPERTEL COMMUNICATIONS, INC. 5609 WHATCOM TELECOMM

5228 SUPERTEL COMMUNICATIONS, INC. 5610 LMG TEL, INC

5229 SUPERTEL COMMUNICATIONS, INC. 5611 PNG TELECOMMUNICATIONS

5236 MELLON BANK N.A. 5615 CAM-NET COMMUNICATIONS NETWORK, INC. 5237 COMPUSERVE 5620 TELEHOP COMMUNICATIONS. INC.

5238 COMPUSERVE 5623 FEDERAL TRANSTEL, INC

5239 COMPUSERVE 5624 MASTERCARD INTERNATIONAL

5240 COMPUSERVE 5626 TEL-ONE

5247 MASTERCARD INTERNATIONAL 5627 OHIO DEPARTMENT OF ADMINISTRATIVE SVCS.

5252 COLORADO CITY LINK 5630 TELEGROUP

5254 FIRST USA 5648 VMA, INC. dba UNIVERSITY TELEPHONE SERVICES, INC. 5267 CMS COMMUNICATIONS 5653 SPECIALIZED TELECOMMUNICATIONS

5268 VALU-LINE LONG DISTANCE 5654 MASTERCARD INTERNATIONAL

5269 COX COMMUNICATIONS, INC. 5656 CELLULAR ONE WASHINGTON/BALTIMORE 5276 BELLSOUTH TELECOMMUNICATIONS 5666 FIRST FINANCIAL MANAGEMENT CORP. 5282 CELLULAR ONE WASHINGTON/BALTIMORE 5677 WATS/800 INC.

5283 XPEDITE SYSTEMS, INC. 5678 AMERITECH SERVICES

5285 THE OHIO STATE UNIVERSITY 5679 NORTH PITTSBURGH TELEPHONE COMPANY 5293 HORIZON CELLULAR TELCO 5682 METROTIME COMMUNICATIONS

5299 CONNECTNET 5693 DELUXE DATA SYSTEMS

5300 AT&T BELL LABORATORIES 5698 MELLON BANK N.A. 5315 FIRST HAWAIIAN BANK 5700 PHOENIX NETWORK 5323 CHARITON VALLEY LONG DISTANCE CORPORATION 5708 ARTHUR ANDERSON & CO. 5325 STATE OF CAL. HEALTH AND WELFARE AGENCY DATA CENTER 5717 NETWORK ONE, INC.

5326 STATE OF CAL. HEALTH AND WELFARE AGENCY DATA CENTER 5721 VOICE TECHNOLOGY CORPORATION 5327 IEC COMMUNICATIONS, INC. 5735 FTI COMMUNICATIONS

5340 DELUXE DATA SYSTEMS 5747 MINNESOTA STATE RELAY - TRIAD BOARD 5347 MASTERCARD INTERNATIONAL 5750 CORESTATES FINANCIAL CORP

5353 US AIR 5751 CORESTATES FINANCIAL CORP

5359 DELUXE DATA SYSTEMS 5752 CORESTATES FINANCIAL CORP 5365 EMI COMMUNICATIONS CORP. 5754 ADVANTIS

5368 BUDGET CALL LONG DISTANCE 5757 CELLULAR ONE WASHINGTON/BALTIMORE 5377 SINCLAIR OIL CORP 5759 VALULINE LONG DISTANCE

5379 E-SCRIPT L.L.C. 5766 ETSC

5390 ONE-2-ONE COMMUNICATIONS 5768 BRINDLEE MOUNTAIN TELEPHONE COMPANY

5391 FIFTH THIRD BANK 5769 REAL CONNECT

5395 HARMONIC SYSTEMS INCORPORATED 5772 ADVANTIS 5396 HARMONIC SYSTEMS INCORPORATED 5775 BMG

5397 HARMONIC SYSTEMS INCORPORATED 5777 FEDERAL TRANSTEL, INC 5398 HARMONIC SYSTEMS INCORPORATED 5778 ARCO PAYPOINT 5399 HARMONIC SYSTEMS INCORPORATED 5783 ARTHUR ANDERSON & CO.

(17)

LIST OF FGB CIC CODE ASSIGNMENTS--CONTINUED

SORTED BY CIC CODE

(AS OF MARCH 31, 1997)

CODE ASSIGNED TO

5795 CAPROCK COMMUNICATIONS 5800 ENVOY CORPORATION

5801 AVIRNEX COMMUNICATIONS GROUP 5813 VALU-LINE OF LOUISIANA, INC. 5819 CABLEVISION LIGHTPATH, INC.

5825 TRANSACTION NETWORK SERVICES, INC. 5829 TRANSACTION NETWORK SERVICES, INC. 5832 CROSSCHECK

5834 CTS TELCOM OF FLORIDA 5836 BRANSON TELEPHONE

5842 US WEST INTERPRISE AMERICA, INC. 5854 ONEIDA COUNTY TELEPHONE LONG DISTANCE 5858 CELLULAR ONE WASHINGTON/BALTIMORE 5867 EQUAL ACCESS OF WASHINGTON 5874 US COMMUNICATIONS,INC. 5875 U.S. COMMUNICATIONS, INC. 5876 U.S. COMMUNICATIONS, INC. 5877 U.S. COMMUNICATIONS, INC.

5879 TRANSACTION NETWORK SERVICES, INC. 5882 THE TELEPHONE CONNECTION OF L.A., INC. 5885 VIATEL, INC.

5888 FIRST FINANCIAL MANAGEMENT CORP.

5893 CONCORD TELEPHONE LONG DISTANCE (CT LONG DISTANCE) 5894 OKLAHOMA LONG DISTANCE

5895 METROTEL COMMUNICATIONS 5945 NEW TIMES, INC.

5950 FEDERAL TRANSTEL, INC 5953 LYNK SYSTEMS, INC. 5959 FEDERAL TRANSTEL, INC 5969 FONES WEST DIGITAL SYSTEMS 5978 WESTEL TELECOMMUNICATIONS LTD. 5999 DELUXE DATA SYSTEMS

(18)

5104 AAA TELEPHONE & COMMUNICATIONS INC. 0004 ATX TELECOMMUNICATIONS SERVICES 1234 ACC LONG DISTANCE CORPORATION 5300 AT&T BELL LABORATORIES

1345 ACC LONG DISTANCE CORPORATION 1869 AT&T CANADA LONG DISTANCE SERVICES CO. 1991 ACCESS LONG DISTANCE 1858 AT&T CANADA LONG DISTANCE SERVICES CO. 0937 ACCESS LONG DISTANCE 1686 AT&T CANADA LONG DISTANCE SERVICES CO. 0013 ACCESS SERVICES dba PACIFIC NW TELECOM 1732 AT&T COMMUNICATIONS

0551 ACCESS-PLUS, INC. 1288 AT&T COMMUNICATIONS 0282 ACTION TELCOM CO. 0988 AT&T EASYLINK SERVICES 1506 ADP AUTONET 0375 AT&T EASYLINK SERVICES 0260 ADVANCED COMMUNICATIONS SYSTEMS INC. 1314 AT&T WIRELESS SERVICES, INC. 1567 ADVANCED MKG. SVCS., dba DIAL ANYWHERE 0302 AUSTIN BESTLINE

0927 ADVANCED RADIO COMMUNICATIONS SYSTEMS 1235 AUTOMATED TELEPHONE

5224 ADVANTAGE COMMUNICATIONS GROUP, INC. 5801 AVIRNEX COMMUNICATIONS GROUP 5754 ADVANTIS 1992 A.B.E. OF ALABAMA, INC. dba ECONOLINE 1754 ADVANTIS 0956 BANK OF AMERICA, NT & SA

5772 ADVANTIS 5556 BAY SPRINGS LONG DISTANCE

1772 ADVANTIS 0190 BCS COMMUNICATIONS

1755 ADVANTIS 1243 BEEHIVE TELEPHONE CO., INC.

1436 ALARM CENTER, INC. 0652 BELL ATLANTIC COMMUNICATIONS, INC. 0886 ALIANT SYSTEMS, INC. 0272 BELL ATLANTIC COMMUNICATIONS, INC. 0579 ALIANT SYSTEMS, INC. 5062 BELLSOUTH BUSINESS SYSTEMS 1075 ALLCOMM LONG DISTANCE, INC. 5063 BELLSOUTH BUSINESS SYSTEMS 1148 ALLEGAN CELLULAR L.P. 5061 BELLSOUTH BUSINESS SYSTEMS 1044 ALLNET COMM. SVC. INC. [LDX,LEXITEL] 5478 BELLSOUTH TELECOMMUNICATIONS 1444 ALLNET COMM. SVC. INC. [LDX,LEXITEL] 5276 BELLSOUTH TELECOMMUNICATIONS 1539 ALLNET [LEXITEL/LDX] 0950 BENEFICIAL DATA PROCESSING CORP. 1066 ALLNET [LEXITEL/LDX] 0867 BITTEL TELECOMMUNICATIONS CORP. 1061 AMERICAN COMMUNICATIONS NETWORK 1820 BIZTEL LTD.

1645 AMERICAN COMMUNICATIONS TECHNOLOGY, INC. 0870 BLUE RIDGE TELEPHONE 1411 AMERICAN EXPRESS TRAVEL RELATED SVCS. 5775 BMG

1251 AMERICAN INT'L. TELECOMMUNICATIONS 1037 BN1 TELECOMMUNICATIONS, INC. 0028 AMERICAN LONG DISTANCE CORPORATION 5836 BRANSON TELEPHONE

1241 AMERICAN LONG LINES 5768 BRINDLEE MOUNTAIN TELEPHONE COMPANY 0773 AMERICAN L.D. OPERATOR SERVICE CO. 5115 BROOKS FIBER COMMUNICATIONS

1437 AMERICAN NATIONAL TELCOM 1821 BT NORTH AMERICA, INC. 0370 AMERICAN NETWORK EXCHANGE INC. 5368 BUDGET CALL LONG DISTANCE 5163 AMERICAN NORTEL COMM. INC. 1833 BUSINESS TELECOM, INC. 0322 AMERICAN SHARECOM, INC. 5171 BUYPASS CORPORATION 1231 AMERICAN SHARECOM, INC. 1281 BUYPASS CORPORATION 1400 AMERICAN SHARECOM, INC. 5098 B.P. OIL COMPANY

0663 AMERICAN TELCO NETWORK SERVICES INC. 0223 CABLE & WIRELESS COMMUNICATIONS, INC. (TDX) 0366 AMERICAN TELCO, INC. 0839 CABLE & WIRELESS COMMUNICATIONS, INC. (TDX) 1573 AMERICAN TELECOMMUNICATIONS HOLDING LTD. 0566 CABLE & WIRELESS COMMUNICATIONS, INC. (TDX) 1362 AMERISYSTEMS, INC. 5819 CABLEVISION LIGHTPATH, INC.

1039 AMERISYSTEMS, INC. 1287 CALIFORNIA STATE LOTTERY

5025 AMERITECH 1344 CALL AMERICA BUSINESS COMM. CORP. 5050 AMERITECH SERVICES 1351 CALL AMERICA OF RIVERSIDE

5678 AMERITECH SERVICES 0410 CALL AMERICA/PALM DESERT 5555 AMERITECH SERVICES 1291 CALL SAVERS, INC.

0794 AMERITEL 1091 CALL TECHNOLOGY CORP. OF PHILADELPHIA 1964 AMERITEL LONG DISTANCE FOR LESS 1219 CALL USA CORP.

0959 AMRIGON ENTERPRISES, INC. 0487 CAMBRIDGE COMMUNICATIONS 1514 ANNE ARUNDEL COUNTY 1670 CAMERON LONG DISTANCE

1613 AN-SER SERVICES (FROMM SERVICES, INC.) 5615 CAM-NET COMMUNICATIONS NETWORK, INC. 5068 APPLIED SIGNAL CORPORATION 1046 CAM-NET, INC.

5031 ARC NETWORKS 1425 CAPITAL NETWORK SYSTEMS INC. 0639 ARCADA COMMUNICATIONS 0221 CAPITAL TELECOMMUNICATIONS, INC. 5778 ARCO PAYPOINT 1963 CAPITAL TELECOMMUNICATIONS, INC. 5051 ARKANSAS BLUE CROSS BLUE SHIELD 5795 CAPROCK COMMUNICATIONS 5052 ARKANSAS BLUE CROSS BLUE SHIELD 1292 CARD ESTABLISHMENT SERVICES 5012 ARRIVA COMMUNICATIONS, INC. 1692 CARD ESTABLISHMENT SERVICES 1704 ARTHUR ANDERSON & CO. 1492 CARD ESTABLISHMENT SERVICES

5708 ARTHUR ANDERSON & CO. 1383 CARIBBEAN TELEPHONE & TELEGRAPH, INC. 5783 ARTHUR ANDERSON & CO. 0788 C-COM

0139 ASCENDING TECHNOLOGIES 1554 CELLTOLL CORPORATION

1419 ASSOCIATED GROCERS, INC. 5757 CELLULAR ONE WASHINGTON/BALTIMORE 1279 ASSOCIATED TELENET INC./ A CTI COMPANY 5151 CELLULAR ONE WASHINGTON/BALTIMORE 1125 ATLANTIC TELEPHONE COMPANY, INC. 5656 CELLULAR ONE WASHINGTON/BALTIMORE 0913 ATS COMMUNICATIONS, INC. 5858 CELLULAR ONE WASHINGTON/BALTIMORE

(19)

LIST OF FGB CIC CODE ASSIGNMENTS--CONTINUED

SORTED BY ENTITY

(AS OF MARCH 31, 1997)

5282 CELLULAR ONE WASHINGTON/BALTIMORE 5340 DELUXE DATA SYSTEMS 1399 CENTRAL NEW YORK TALK-TRANSIT 1326 DIAL AMERICA, INC. 1550 CENTURY LONG DISTANCE 1350 DIAL-NET, INC. 0914 CENTURY TELECOMMUNICATIONS, INC. 1250 DIAL-NET, INC.

0505 CENTURY TELECOMMUNICATIONS, INC. 1768 DIGINET COMMUNICATIONS 0909 CHADWICK TELEPHONE 0853 DIGITAL NETWORK, INC. 5323 CHARITON VALLEY LONG DISTANCE CORPORATION 1972 DIGITAL NETWORK, INC.

1285 CHECKRITE 1586 DIGITAL NETWORK, INC.

1286 CINCINNATI BELL LONG DISTANCE 0071 DIGITAL NETWORK, INC. 1293 CINCINNATI BELL LONG DISTANCE 1850 DIGITEL

0654 CINCINNATI BELL LONG DISTANCE 0320 DIGITEL 1614 CINCINNATI BELL LONG DISTANCE 1064 DNS, INC.

5477 CITILINK OF UT, L.L.C. 1430 DOMINO'S PIZZA INC. 0774 CITYNET COMMUNICATIONS, INC. 1808 EASTERN TELECOM GROUP 5267 CMS COMMUNICATIONS 0136 EASTERN TELECOM INTERNATIONAL 1629 COACHELLA VALLEY COMM., dba INTEG. OPER. SVCS. 1054 EASTERN TELEPHONE SYSTEMS, INC. 1902 COAST TO COAST TELECOMMUNICATIONS 0356 EASTMAN KODAK COMPANY 0966 COASTAL AUTOMATED COMMUNICATIONS CORP. 0327 ECI COMMUNICATIONS 5136 COASTAL LONG DISTANCE SERVICES, INC. 0497 ECON-A-CALL INC. OF HAYS

1881 COASTAL TELEPHONE COMPANY 1325 ECONO CALL LONG DISTANCE SERVICES 0661 COASTAL TELEPHONE COMPANY 0634 ECONO-LINE MIDLAND

1661 COASTAL TELEPHONE CO. 0373 ECONO-LINE WACO 5252 COLORADO CITY LINK 0060 ECONOMY TELEPHONE, INC. 1619 COLORADO RIVER COMMUNICATIONS 1273 EDS

0306 COLORADO RIVER COMMUNICATIONS 1802 ELECTRIC LIGHTWAVE, INC. 1611 COMCENTRAL, INC. 5365 EMI COMMUNICATIONS CORP.

1602 COMLINK USA 1809 ENVOY

1336 COMMONWEALTH LONG DISTANCE CO. 5083 ENVOY CORPORATION 0339 COMMUNICATION CABLE LAYING CO., INC. 5089 ENVOY CORPORATION 0349 COMMUNICATION CABLE LAYING CO., INC. 5800 ENVOY CORPORATION

0675 COMMUNICATION SERVICES OF COLORADO 5867 EQUAL ACCESS OF WASHINGTON 1502 COMMUNICATION TELESYSTEMS INTL. (CTS) 1342 EQUITABLE GAS

1667 COMMUNICATIONS INC., dba ECI 5600 ESCONDIDO TELEPHONE COMPANY 1073 COMMUNICATIONS OPTIONS, INC. 0441 ESCONDIDO TELEPHONE COMPANY 1484 COMMUNITY LONG DISTANCE INC. 5379 E-SCRIPT L.L.C.

1716 COMPUSERVE 0592 ESS VENTURES, INC.

5238 COMPUSERVE 5500 ESS VENTURES, INC.

5237 COMPUSERVE 5766 ETSC

5239 COMPUSERVE 0048 ETSC

5240 COMPUSERVE 0752 EXCEL TELECOMMUNICATIONS, INC. 0266 COMSYSTEMS NETWORK SERVICES 5432 EXCEL TELECOMMUNICATIONS, INC. 5893 CONCORD TELEPHONE LONG DISTANCE (CT LONG DISTANCE) 0486 EXECULINES OF SACRAMENTO

5299 CONNECTNET 0511 EXECULINES OF SACRAMENTO

1319 CONQUEST 1831 EXECULINES OF SACRAMENTO

1257 CONQUEST 1633 EXECULINES OF SACRAMENTO, INC.

1239 CONSOLIDATED COMMUNICATIONS CORPORATION 0202 EXECULINES OF THE NORTHWEST, INC. 1725 CONSOLIDATED NETWORK, INC. 0705 EXECULINES OF THE NORTHWEST, INC. 1646 CONTACT AMERICA, INC. 1865 EXPRESS COMMUNICATIONS, INC. 5559 COOPERATIVE COMMUNICATIONS, INC. 1493 EXTELCOM dba EXPRESS TEL 5752 CORESTATES FINANCIAL CORP 1429 EXTELCOM dba EXPRESS TEL 5750 CORESTATES FINANCIAL CORP 1435 EXTELCOM dba EXPRESS TEL 5751 CORESTATES FINANCIAL CORP 1494 EXTELCOM dba EXPRESS TEL 1690 CORPORATE TELEMANAGEMENT GROUP 1447 FAXNET CORPORATION

0470 COSHOCTON L.D.S. 0922 FEB CORPORATION

5035 COUNTY OF MONTGOMERY COMMUNICATIONS DIV. 5950 FEDERAL TRANSTEL, INC 5269 COX COMMUNICATIONS, INC. 5959 FEDERAL TRANSTEL, INC

5832 CROSSCHECK 5777 FEDERAL TRANSTEL, INC

5834 CTS TELCOM OF FLORIDA 5465 FEDERAL TRANSTEL, INC 1203 CYPRESS TELECOMMUNICATIONS CORP. (CYTEL) 5623 FEDERAL TRANSTEL, INC 1615 C.P.I. dba GULF STATES COMMUNICATIONS 0679 FEIST LONG DISTANCE 1361 DAKOTA COOPERATIVE TELECOMM., INC. 0475 FIBERFONE OF FLORIDA, INC.

5557 DAKOTA TELECOM, INC. (DTI) 0825 FIBERLINE NETWORK COMMUNICATIONS L.P.

1941 DATA COM 5111 FIBERNET TELEMANAGEMENT, INC.

1233 DELTACOM LONG DISTANCE SERVICES 5391 FIFTH THIRD BANK

1240 DELTACOM, INC. 0277 FIRST CHOICE LONG DISTANCE, INC. 5359 DELUXE DATA SYSTEMS 1935 FIRST CHOICE LONG DISTANCE, INC. 5999 DELUXE DATA SYSTEMS 1472 FIRST CHOICE LONG DISTANCE, INC. 0693 DELUXE DATA SYSTEMS 1324 FIRST COMMUNICATIONS, INC. (FDR) 5693 DELUXE DATA SYSTEMS 5173 FIRST DATA RESOURCES, INC. (FST)

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1337 FIRST DATA RESOURCES, INC. (FST) 0402 INTEGRETEL, INC. 1841 FIRST FINANCIAL MANAGEMENT CORP. 1465 INTELCO

5222 FIRST FINANCIAL MANAGEMENT CORP. 5599 INTELCOM GROUP (USA), INC. 5888 FIRST FINANCIAL MANAGEMENT CORP. 1463 INTELENET COMMISSION 5545 FIRST FINANCIAL MANAGEMENT CORP. 5424 INTELLICALL

5666 FIRST FINANCIAL MANAGEMENT CORP. 0616 INTER COMM. MANAGEMENT NETWORK 5315 FIRST HAWAIIAN BANK 0025 INTER CONTINENTAL TELEPHONE 5184 FIRST NATIONAL BANK OF MARYLAND 0393 INTERMEDIA COMMUNICATIONS, INC. 5183 FIRST NATIONAL BANK OF MARYLAND 0664 INTERMOUNTAIN DIGITAL NETWORK

5182 FIRST NATIONAL BANK OF MARYLAND 1076 INTERNATIONAL TELEMEDIA ASSOCIATES, INC. 5181 FIRST NATIONAL BANK OF MARYLAND 0596 INTERNET, INC.

5180 FIRST NATIONAL BANK OF MARYLAND 5064 INTERNET, INC. 1206 FIRST OF AMERICA BANK SE MICHIGAN N.A. 5065 INTERNET, INC.

5254 FIRST USA 1685 INTL.800 TELECOM dba TELECALL LONG DIST.

5475 FIRSTEL 1283 IOWA COMMUNICATIONS NETWORK

1739 FLAT RATE COMMUNICATIONS 1225 IOWA NETWORK SERVICES, INC. 0197 FLEABUSTERS 0065 ISACOMM, INC. [SPRINT] 1096 FLEX COMMUNICATIONS SYSTEM 1478 ITC NETWORKS OF UTAH 1010 FLEX COMMUNICATIONS SYSTEM 1897 ITC NETWORKS OF UTAH 5969 FONES WEST DIGITAL SYSTEMS 1468 ITC NETWORKS OF UTAH 1377 FONES WEST DIGITAL SYSTEMS 1947 ITI INCORPORATED

0985 FONOROLA 5588 IT&E OVERSEAS, INC.

5507 FONOROLA 5566 IT&E OVERSEAS, INC.

0637 FOX COMMUNICATIONS CORP. 5511 IT&E OVERSEAS, INC. 0211 FRONTIER COMMUNICATIONS INTERNATIONAL, INC. 5483 IT&E OVERSEAS, INC. 1003 FRONTIER COMMUNICATIONS INTERNATIONAL, INC. 5522 IT&E OVERSEAS, INC.

1515 FRONTIER COMMUNICATIONS OF NEW ENGLAND, INC. 1696 JC PENNEY BUSINESS SERVICES 1058 FRONTIER COMMUNICATIONS OF THE GREAT LAKES, INC. 5079 JC PENNEY BUSINESS SERVICES 1500 FRONTIER COMMUNICATIONS OF THE GREAT LAKES, INC. 0062 KENTUCKY TELEPHONE CORP. 1232 FRONTIER COMMUNICATIONS OF THE GREAT LAKES, INC. 1703 KEYSTONE TELECOMMUNICATIONS INC. 0086 FRONTIER COMMUNICATIONS OF THE MID ATLANTIC, INC. 1545 KEYSTONE TELECOM, INC.

1694 FRONTIER LONG DISTANCE AMERICA 0989 KRB TELECOM

5735 FTI COMMUNICATIONS 0218 KRISTIN ENTERPRISES dba TEL-CENTRAL 1728 GARDEN STATE LONG DISTANCE TELEPHONE 0552 LAKE STATES COMMUNICATIONS 1997 GAS COMPANY OF NEW MEXICO 5535 LAKEDALE LINK, INC.

1195 GASCARD 5013 LANSER TELECOM, INC.

1077 GENERAL COMMUNICATION, INC. 1562 LCI

1434 GENERAL ELECTRIC INFORMATION SERVICES 1452 LCI INTERNATIONAL 1836 GENERAL SERVICES ADMINISTRATION 1432 LCI INTERNATIONAL 5186 GLENS FALLS HOSPITAL 0537 LCI INTERNATIONAL 1295 GLENS FALLS LONG DISTANCE SERVICE 1451 LCI INTERNATIONAL

0469 GMW COMPANY 0358 LCI INTERNATIONAL TELECOM CORP. 5175 GROCERS SUPPLY COMPANY, INC. 0561 LCT LONG DISTANCE

1583 GST NET, INC. 0684 LCT LONG DISTANCE

0760 GTE TELECOM 1628 LDDS

1962 GULF LONG DISTANCE, INC. 1299 LECNET

0089 HARBOR BAY TELECOMMUNICATIONS 1507 LEE HARBOR HOMES

5399 HARMONIC SYSTEMS INCORPORATED 5438 LERMER OVERSEAS TELECOMMUNICATIONS, INC. 5398 HARMONIC SYSTEMS INCORPORATED 1708 LIGHT LINK, INC. dba TAYLOR COMM. GRP. 5397 HARMONIC SYSTEMS INCORPORATED 1563 LINKUSA CORPORATION

5396 HARMONIC SYSTEMS INCORPORATED 1012 LITEL/LCI INTERNATIONAL 5395 HARMONIC SYSTEMS INCORPORATED 1236 LITEL/LCI INTERNATIONAL 0015 HAWAIIAN TELEPHONE COMPANY 1253 LITEL/LCI INTERNATIONAL 0049 HEDGES & ASSOCIATES 5610 LMG TEL, INC

1722 HI-PLAINS NTS COMMUNICATIONS 0035 LONG DISTANCE AMERICA 0965 HOGAN COMMUNICATIONS 0607 LONG DISTANCE COMMUNICATIONS 5293 HORIZON CELLULAR TELCO 1533 LONG DISTANCE DISCOUNT, INC. 5484 HORIZON TELECOMMUNICATIONS, INC. 1536 LONG DISTANCE MANAGEMENT 1819 HUB DISTRIBUTING, INC. 1382 LONG DISTANCE MANAGEMENT, INC. 5419 H.G. TELECOM, INC. 1631 LONG DISTANCE OF MICHIGAN

1426 IBM 1564 LONG DISTANCE OHIO, INC.

1706 ICON COMMUNICATIONS CORPORATION 1036 LONG DISTANCE SAVERS 5327 IEC COMMUNICATIONS, INC. 1318 LONG DISTANCE SAVERS

1141 IFC COMMUNICATIONS 1213 LONG DISTANCE TELEPHONE SAVERS 0527 INDEPENDENCE TELEPHONE CO. 1252 LONG DISTANCE/USA [SPRINT] 1483 INDEPENDENT LONG DISTANCE 1871 LOYD COMM. dba COMTEL/HOT SPRINGS 1460 INDEPENDENT NETWORK SERVICES 5953 LYNK SYSTEMS, INC.

1791 INFOCOM INTERNATIONAL, INC. 0931 L.D. NETWORK, INC. 1510 INNOVATIVE COMMUNICATIONS, INC. 0005 MACY'S OF CALIFORNIA

(21)

LIST OF FGB CIC CODE ASSIGNMENTS--CONTINUED

SORTED BY ENTITY

(AS OF MARCH 31, 1997)

1094 MAG CARD 0017 NCHE TELECOMMUNICATIONS NETWORK, INC. 0357 MANITOWOC LONG DISTANCE SERVICE 1098 NETECH COMM., A US WEST COMPANY 1014 MARATHON COMMUNICATIONS 1026 NET-TEL CORPORATION

5468 MARYLAND STATE GOVERNMENT 1978 NETWORK BILLING & COLLECTION, INC. (NBC) 5624 MASTERCARD INTERNATIONAL 5577 NETWORK CARRIER SERVICES

5247 MASTERCARD INTERNATIONAL 0765 NETWORK LONG DISTANCE 5347 MASTERCARD INTERNATIONAL 5717 NETWORK ONE, INC. 5654 MASTERCARD INTERNATIONAL 5945 NEW TIMES, INC. 0624 MASTERCARD INTERNATIONAL 5106 NEW YORK LOTTERY

1780 MATRIX TELECOM 5119 NEXTLINK

1183 MCI 1581 NORCOMM

1222 MCI 1582 NORCOMM

1188 MCI 1933 NORTH AMERICAN COMMUNICATIONS, INC.

1122 MCI 1890 NORTH COUNTY COMMUNICATIONS CORP.

1133 MCI 5679 NORTH PITTSBURGH TELEPHONE COMPANY

1986 MCI 1491 NORTHERN ARIZONA COMMUNICATIONS CORP.

1826 MCI 1332 NORTHLAND TELEPHONE SYSTEMS LTD.

1022 MCI 0638 NORTHWEST TELECOM, LTD.

0888 MCI 0908 NTC, INC.

1622 MEDE AMERICA 0687 NTS COMMUNICATIONS, INC.

5587 MELLON BANK N.A. 0698 NYNEX

5038 MERCHANT LINK, INC. 0805 OCI

5039 MERCHANT LINK, INC. 0658 OCI

1655 MERCHANT-LINK, INC. 1359 OFF CAMPUS COMMUNICATIONS

5037 MERCHANT-LINK, INC. 1644 OHIO DEPARTMENT OF ADMINISTRATIVE SVCS. 5036 MERCHANT-LINK, INC. 5446 OHIO DEPARTMENT OF ADMINISTRATIVE SVCS. 1565 METRO ONE DIRECT 5627 OHIO DEPARTMENT OF ADMINISTRATIVE SVCS. 1860 METRO TELECOMM.SVCS., INC. dba METROCOMM 5894 OKLAHOMA LONG DISTANCE

1635 METRO TELEPHONE INC. 1391 OMNICALL COMMUNICATIONS CORPORATION 5895 METROTEL COMMUNICATIONS 1226 ONE CALL COMMUNICATIONS

5682 METROTIME COMMUNICATIONS 1880 ONE CALL COMMUNICATIONS 1440 MFS INTELENET, INC. 1873 ONE STAR LONG DISTANCE 1648 MID MCND dba MIDCOM COMMUNICATIONS, INC. 5390 ONE-2-ONE COMMUNICATIONS 1621 MID TNC dba MIDCOM COMMUNICATIONS, INC. 5607 ONE-2-ONE COMMUNICATIONS 0996 MIDCO COMMUNICATIONS 5121 ONE-2-ONE COMMUNICATIONS 0338 MIDCO COMMUNICATIONS 0390 ONE-2-ONE COMMUNICATIONS

0558 MIDCOM OF ARIZONA, INC. 5854 ONEIDA COUNTY TELEPHONE LONG DISTANCE

0519 MIDCOM, INC. 1891 OPERATOR SERVICE COMPANY

1816 MID-TEL L.D,. INC. OF WILLISTON 0695 OPTICALL COMMUNICATIONS SERVICES 1932 MID-TEL L.D. OF MINOT 1651 O.L.C. COMPANY

1980 MIDWEST TELECOM 0572 PAC TEL PAGING, A PACIFIC TELESIS CO. 1680 MIDWEST TELEPHONE SERVICE, INC. 0757 PACE LONG DISTANCE SERVICE 0264 MIIC dba POLARIS TELCOM 0297 PACIFIC GATEWAY EXCHANGE 5747 MINNESOTA STATE RELAY - TRIAD BOARD 5131 PACIFIC TELECOM, INC. (PTI)

5601 MISSOURI LOTTERY 1099 PAC-WEST TELECOMM, INC. dba AMERICALL 1392 MOBIL OIL CREDIT CORP. 1262 PAC-WEST TELECOMM, INC. dba AMERICALL 0608 MODULAR DATA, INC. 1261 PAC-WEST TELECOMM, INC. dba AMERICALL 0517 MONTANA LONG DISTANCE, INC. 1717 PASS WORD, INC.

1305 MOTOROLA INC. 1412 PENN TELECOM, INC.

0912 MRC TELECOMMUNICATIONS, INC. 1216 PENNY FONE

1674 MSI COMMUNICATIONS, INC. 1779 PEOPLES PHONE COMPANY

1379 MSI COMMUNICATIONS, INC. 1227 PEOPLES TELEPHONE COMPANY, INC.

0806 NACT 0490 PHOENIX COMMUNICATIONS GROUP, INC.

1549 NATIONAL BRANDS, INC. 5011 PHOENIX NETWORK 1632 NATIONAL DATA CORPORATION 0420 PHOENIX NETWORK 0861 NATIONAL PAYPHONE SUPPLY dba RATE SAVER 5010 PHOENIX NETWORK 0657 NATIONAL TELECOM. OF FLORIDA 5700 PHOENIX NETWORK 0067 NATIONAL TELEPHONE COMMUNICATIONS, INC. 0244 PHOENIX NETWORK 0746 NATIONAL TELEPHONE EXCHANGE (PA) 0714 PHONELINK, INC. 1341 NATIONAL TELE-SAV, INC. 1930 PILGRIM TELEPHONE INC. 1623 NATIONAL TELESERVICE 0905 PIZZA HUT, INC.

1401 NATIONAL TELESERVICE 5611 PNG TELECOMMUNICATIONS

0627 NATIONWIDE EMERGENCY TELECOMM. SYSTEM 5526 POKA LAMBRO TELECOMMUNICATIONS, INC. 0057 NATIONWIDE LONG DISTANCE, INC. 1477 POPP TELECOM

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0045 PSA, INC. 1245 TACONIC LONG DISTANCE SERVICE, CORP. 1249 PSP MARKETING GROUP, INC. 0110 TANDEM ACCESS FOR DATABASE QUERY 1830 PUBLIC SERVICE COMPANY OF NM 0214 TCA COMMUNICATIONS

5105 PUBLIC SERVICE COMPANY OF NM 0093 TCA COMMUNICATIONS

0740 PUBLIC SWITCH CORP. 1718 TCG

1676 PUGET SOUND BANK 1560 TCI COMMUNICATIONS, INC. . 5454 QUESTAR INFOCOMM INCORPORATED 1827 TCS NETWORK SERVICES

5067 RCX, INC. 1178 TEAM ELECTRONICS

5769 REAL CONNECT 0709 TEL AMERICA

1662 RESOURCE TECHNOLOGY 1729 TEL AMERICA 1793 RESPONSE TELCOM, L.P. 0700 TEL AMERICA 5194 RETAIL DATA NETWORKS (RDN) 1919 TEL NET INC. 5193 RETAIL DATA NETWORKS (RDN) 0378 TEL SERV

5192 RETAIL DATA NETWORKS (RDN) 1007 TELAMARKETING COMMUNICATIONS, INC. 5191 RETAIL DATA NETWORKS (RDN) 1522 TELAPEX LONG DISTANCE, INC.

5190 RETAIL DATA NETWORKS (RDN) 1973 TEL-A-SAVE COMMUNICATIONS SYSTEMS, LTD. 1764 ROANOKE TELEPHONE COMPANY 0083 TELCO

0521 ROANOKE & BOTETOURT TELEPHONE CO. 0699 TEL-COM, INC. 5075 ROCKEFELLER GROUP TELECOMM. SVCS. 1915 TELE TECH, INC. 5413 ROCKY MTN. HOSP dba BLUE CROSS OF CO 0529 TELECOM WEST

0618 RSL COM U.S.A. 0340 TELECOMM. TECHNOLOGIES, INC. (TEL-TECH) 0642 R,D,&J COMMUNICATIONS MGMT., INC. 1476 TELECOMPUTE CORPORATION

5070 SALT LAKE TEL-A-SYS. C/O THE TANNER GRP. 0220 TELECOM*USA [MCI] 5071 SALT LAKE TEL-A-SYS. C/O THE TANNER GRP. 1900 TELECOM*USA [MCI] 1591 SANTA FE RAILWAY 0832 TELECOM*USA [MCI] 1604 SB COMMUNICATIONS, INC. 1224 TELECOM*USA [MCI]

1898 SBS/MCI 1771 TELECOM*USA [MCI]

1088 SBS/MCI 0835 TELECOM*USA [MCI]

1018 SHARED USE NETWORK 1876 TELECOM*USA [MCI] 0207 SHENANDOAH LONG DISTANCE COMPANY 1852 TELECOM*USA [MCI] 1720 SILVERADO COMMUNICATIONS 1857 TELECOM*USA [MCI] 5377 SINCLAIR OIL CORP 1092 TELECOM*USA [MCI] 1641 SOURIS RIVER TELECOMMUNICATIONS COMPANY 1087 TELECOM*USA [MCI] 1807 SOUTH CAROLINA NETWORK, INC. 1321 TELECOM*USA [MCI]

5174 SOUTHEAST SWITCH 1518 TELECON COMMUNICATIONS CORPORATION 1812 SOUTHLAND CABLEVISION 0522 TELEFIND CORPORATION

1993 SOUTHWEST UNITED COMMUNICATION, INC. 5547 TELEFONICA LARGA DISTANCIA DE P.R., INC. 0056 SP TELECOM 1547 TELEFONICA LARGA DISTANCIA DE P.R., INC. 5653 SPECIALIZED TELECOMMUNICATIONS 5630 TELEGROUP

1333 SPRINT 5620 TELEHOP COMMUNICATIONS. INC.

0872 SPRINT 0887 TELEMANAGEMENT CONSULTANTS CORPORATION 1033 SPRINT 1689 TELEMANAGEMENT CONSULTANTS CORPORATION 1177 SPRINT 1620 TELEMONEY SERVICES, A FIRST DATA CORPORATION

0777 SPRINT 0759 TELENET COMM. CORP., (SPRINT)

1352 STANDARD TELCOM, INC. 0499 TELEPHONE ASSOC. dba THIEF RIVER FALLLS LD 1215 STAR TEL OF ABILENE 0837 TELEPHONE ASSOC. LONG DISTANCE SVCS. 0787 STAR TEL OF ABILENE 0829 TELEPHONE ASSOC. LONG DISTANCE SVCS. 1983 STAR TEL OF VICTORIA, INC. 5103 TELEPHONE BILLING SERVICE

1984 STAR TEL TRANSMISSION CO., INC. 1977 TELEPHONE COMMUNICATIONS CORPORATION 1439 STAR TEL, INC. 1673 TELEPHONE CONNECTIONS, INC.

1313 STAR TEL, INC. 1745 TELEPHONE ELECTRONICS NETWORK, LTD.

0210 STARLINE, INC. 0899 TELEPHONE EXPRESS

0480 STAT COMMUNICATIONS 0191 TELEPHONE SUPPORT SYSTEMS, INC. 0762 STATE OF CALIFORNIA - CALNET 0961 TELEPHONE SYSTEMS OF GEORGIA 5113 STATE OF CAL. HEALTH AND WELFARE AGENCY DATA CENTER 1149 TELEPHONE TOWNHALL MEETINGS, INC. 5325 STATE OF CAL. HEALTH AND WELFARE AGENCY DATA CENTER 1731 TELESCAN, INC.

5326 STATE OF CAL. HEALTH AND WELFARE AGENCY DATA CENTER 0380 TELESERV CORPORATION 1682 STATE OF MARYLAND (DEPT OF GEN.SERVICES) 1482 TELE-SYS, INC.

1769 STATE OF NEW YORK 1600 TELEVALUE CORP. dba ECON-O-DIAL RIDGECREST 0189 STATE OF TEXAS - GSC 0409 TELEVOX PUBLIC COMMUNICATIONS, INC.

0929 STENOCALL 1296 TELNEX, INC.

1784 SUNTEL NETWORK, INC. 5626 TEL-ONE

5228 SUPERTEL COMMUNICATIONS, INC. 0945 TEL-OPTIC, INC. dba UNIVERSAL NETWORK SVCS. (UNI-NET) 0171 SUPERTEL COMMUNICATIONS, INC. 0300 TEL-OPTIC, INC. dba UNIVERSAL NETWORK SVCS. (UNI-NET) 5226 SUPERTEL COMMUNICATIONS, INC. 1957 TEL-OPTIC, INC. dba UNIVERSAL NETWORK SVCS. (UNI-NET) 5227 SUPERTEL COMMUNICATIONS, INC. 0489 TEL-OPTIC, INC. dba UNIVERSAL NETWORK SVCS. (UNI-NET) 5229 SUPERTEL COMMUNICATIONS, INC. 1601 TEL-OPTIC, INC. dba UNIVERSAL NETWORK SVCS. (UNI-NET) 0275 SWIFF TRAIN COMMUNICATIONS 1587 TEL-OPTIC, INC. dba UNIVERSAL NETWORK SVCS. (UNI-NET)

0727 SWITCH 2000, INC. 0330 TEL-SHARE

1799 SYMTECH COMMUNICATIONS SERVICES 1520 TEL-SPAN COMMUNICATIONS, INC. 1666 SYSTEMS 1000 1363 TEL-TOLL dba ECON-O-DIAL OF BISHOP