totse.com | AT&T/BOC Routing Codes

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The following is a list of routing codes used by AT&T and Bell Operating Companies (BOC) that you can blue box to. Most codes are used by dialing KP+NPA+XXX+ST where XXX= the code, except where noted. There are notes attached after this list. Codes marked with a ? are unfamiliar to us.

(1) The Rate Quote System is a voice response system used by operators to obtain routing information. The system, now being phased out, was used as an alternative to calling the Rate and Route operator. Operators would key-in required routing information and a synthesized voice would respond. Though the RQS is still operational, operators now obtain routing information from COMPIS (See note 10).

DD = 00 Now
DD = 01 Day Call (08:00-17:00)
DD = 02 Evening Call (17:00-23:00)
DD = 03 Night Call (23:00-08:00)

KP+09+NPA+NXX+ST Gives you the current time for the area and exchange just dialed.

(2) When a code is marked spare, that means that there is no current or planned networkwide usage. It still may be utilized as a non-standard POTS exchange for WATS service by local companies.

(3) When a code is marked reserved, it means that there may be planned networkwide usage.

(4) This code is used by an AT&T custom service. It may be thought of as acting like a special area code and takes the following dialing format: KP+XXX+YYY+YYYY+ST where XXX is the code in question and Y can be any number 0-9.

(5) All "points not on an NPA" and "Cable Control" function as pseudo area codes and are followed by a telephone number.

(6) Calls to the IOC are dialled as follows: KP+160+CCC+ST CCC=Country Code (i.e. 044 or 144 for the UK).

Where PIC is the primary carrier code, CC is the country code and cc is city code. xxxxx is subscriber number. We are not sure exactly when and where these are used.

(8) All four and five digit codes are dialed as follows: KP+NPA+XXXX+ST or KP+NPA+XXXXX+ST. Keep in mind that not every code is in use in every NPA.

(9) The format for an AT&T inward is usually KP+NPA+121+ST -- In some small cities there is an extra code used called a Terminating Toll Centre (TTC) or sometimes just a city code. If a TTC is used, the format is KP+NPA+TTC+121+ST. To get an inward with most BOCs you dial KP+NPA+11591+ST but there are some which use a format of KP+NPA+TTC+121+ST. To get the inward routing for a particular exchange, use the Rate Quote System (RQS).

(10) The number for Rate and Route was 800+141+1212 but this was discontinued sometime last year (1987) when the TSPS operators got a computer terminal called COMPIS. In each there is an inward which acts like a Rate and Route operator. In New York it is 716+121.

(11) With the advent of Alliance Teleconferencing, use of the conference operator dwindled. There are currently four operator handling conferences. They are as follows: Atlanta 404+11511, Minneapolis 507+11511, New York 212+11511 and Oakland 415+11511. 800-225-0233 translates to the conference operator closest to you.

(12) The Marine Operator is used in calling ships that are close to the United States. There is an operator called the "High Seas" operator who can be reached by dialing 800-SEA-CALL (800-732-2255). The High Seas operator is a service of AT&T, while Marisat is an independent company. A High Seas call can go to any ocean for $14.98 for the first 3 minutes and $4.98 for each additional minute. A Marisat only to three oceans and costs $10 a minute.

(13) 116X and 116XX are used to verify an AT&T Calling Card number. You dial KP+NPA+116XX+ST when you hear a "bong" you dial the calling card number. If you use 11611 you enter the number in Touch Tone and if you use 11621 you enter the card number in MF using KP and ST.

(14) These ISC codes are used to provide alternate routing for electro-mechanical switches. Some older electro-mechanical switches, for example #5 Crossbar (5XB) cannot outpulse 011+CCC (CCC=Country Code) for international dialing. AT&T has set up these special codes to handle international calls. A 5XB can dial KP+18X+ST. They would then receive a wink (short blast of 2600 Hz) and would proceed to dial the country code and number. If you want to make an international call you dial KP+(NPA)+18X+ST where the NPA is optional. After the wink dial the country code, city code and number. The "," after the city name is the switch number if there is more then one 4-ESS in that city.

(15) The 187 code was assigned to Atlanta until up to the end of February 1988. AT&T is in the process in routing the calls to the Sherman Oaks Office in California.

(16) To make international calls dial KP+011+CCC+ST where CCC is the country code; and then dial KP+CC+XXXXXXX+ST where CC is the city code and XXXXXXXX is the telephone number.