NumberingData
Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records

PITTSBURG prefixes in area code 903

NANPA records 8 assigned NXX blocks to rate center PITTSBURG in area code 903, 1.0% of the 771 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 4 holders hold those blocks, the largest being SOUTHWESTERN BELL (4), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX (2), AMERICAN MESSAGING SERVICES, LLC (1). The earliest assignment on record here is 2006-10-16 and the most recent 2009-04-16. 7 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area codes 417, 430, 603, 618 – overlay codes cover the same geography, so a rate center is served by all of them.

8 assigned blocks – 1% of 903
4 holders of record
7 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
903-637 American Messaging AMERICAN MESSAGING SERVICES, LLC – no yes
903-708 T-Mobile METROPCS, INC. 2009-04-16 yes yes
903-767 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX – yes yes
903-853 AT&T SOUTHWESTERN BELL – yes yes
903-855 AT&T SOUTHWESTERN BELL – yes yes
903-856 AT&T SOUTHWESTERN BELL – yes yes
903-946 AT&T SOUTHWESTERN BELL 2009-04-13 yes yes
903-960 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 2006-10-16 yes yes

The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.

Who holds the blocks

HolderBrandBlocksShare here
SOUTHWESTERN BELL AT&T 4 50%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX Verizon 2 25%
AMERICAN MESSAGING SERVICES, LLC American Messaging 1 12.5%
METROPCS, INC. T-Mobile 1 12.5%

Same rate center in other codes

Overlay codes cover the same geography, so one rate center is served by all of them.

Frequently asked

Which prefixes belong to PITTSBURG in area code 903?

8 blocks: 637, 708, 767, 853, 855, 856, 946, 960. The table above gives the holder of each.

Which carriers have numbers in PITTSBURG?

SOUTHWESTERN BELL (4 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX (2 blocks), AMERICAN MESSAGING SERVICES, LLC (1 block), METROPCS, INC. (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is PITTSBURG a city?

It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.

Other rate centers in 903

All 771 prefixes in 903