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

ATWATER prefixes in area code 209

NANPA records 18 assigned NXX blocks to rate center ATWATER in area code 209, 2.3% of the 784 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. 5 holders hold those blocks, the largest being T-MOBILE USA, INC. (9), NEW CINGULAR WIRELESS PCS, LLC (4), PACIFIC BELL (3). The earliest assignment on record here is 2002-09-19 and the most recent 2022-03-10. 16 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 234, 320, 330, 350 – overlay codes cover the same geography, so a rate center is served by all of them.

18 assigned blocks – 2.3% of 209
5 holders of record
16 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
209-203 AT&T NEW CINGULAR WIRELESS PCS, LLC 2015-12-11 yes yes
209-219 T-Mobile T-MOBILE USA, INC. 2018-01-08 yes yes
209-276 T-Mobile T-MOBILE USA, INC. 2013-05-06 yes yes
209-326 AT&T NEW CINGULAR WIRELESS PCS, LLC 2014-09-23 yes yes
209-356 AT&T PACIFIC BELL – yes yes
209-357 AT&T PACIFIC BELL – no yes
209-358 AT&T PACIFIC BELL – no yes
209-445 T-Mobile T-MOBILE USA, INC. 2015-03-13 yes yes
209-582 T-Mobile T-MOBILE USA, INC. 2019-12-09 yes yes
209-635 AT&T NEW CINGULAR WIRELESS PCS, LLC 2015-07-31 yes yes
209-643 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA 2010-03-17 yes yes
209-676 T-Mobile T-MOBILE USA, INC. 2002-09-19 yes yes
209-683 Bandwidth BANDWIDTH.COM CLEC, LLC - CA – yes yes
209-741 T-Mobile T-MOBILE USA, INC. 2020-10-16 yes yes
209-767 T-Mobile T-MOBILE USA, INC. 2022-03-10 yes yes
209-812 T-Mobile T-MOBILE USA, INC. – yes yes
209-864 T-Mobile T-MOBILE USA, INC. 2021-12-08 yes yes
209-891 AT&T NEW CINGULAR WIRELESS PCS, LLC 2021-03-25 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
T-MOBILE USA, INC. T-Mobile 9 50%
NEW CINGULAR WIRELESS PCS, LLC AT&T 4 22.2%
PACIFIC BELL AT&T 3 16.7%
TELEPORT COMMUNICATIONS AMERICA, LLC - CA AT&T 1 5.6%
BANDWIDTH.COM CLEC, LLC - CA Bandwidth 1 5.6%

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 ATWATER in area code 209?

18 blocks: 203, 219, 276, 326, 356, 357, 358, 445, 582, 635, 643, 676 and 6 more, all listed in the table above.

Which carriers have numbers in ATWATER?

T-MOBILE USA, INC. (9 blocks), NEW CINGULAR WIRELESS PCS, LLC (4 blocks), PACIFIC BELL (3 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - CA (1 block), BANDWIDTH.COM CLEC, LLC - CA (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is ATWATER 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 209

All 784 prefixes in 209