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

LOS BANOS prefixes in area code 209

NANPA records 17 assigned NXX blocks to rate center LOS BANOS in area code 209, 2.2% 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. 10 holders hold those blocks, the largest being T-MOBILE USA, INC. (3), NEW CINGULAR WIRELESS PCS, LLC (3), PACIFIC BELL (3). The earliest assignment on record here is 2002-03-21 and the most recent 2020-09-24. 14 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 code 350 – overlay codes cover the same geography, so a rate center is served by all of them.

17 assigned blocks – 2.2% of 209
10 holders of record
14 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
209-270 T-Mobile T-MOBILE USA, INC. 2015-04-01 yes yes
209-509 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA – yes yes
209-516 American Messaging AMERICAN MESSAGING SERVICES, LLC – no yes
209-519 T-Mobile T-MOBILE USA, INC. 2018-11-26 yes yes
209-587 T-Mobile METROPCS, INC. – yes yes
209-592 Bandwidth BANDWIDTH.COM CLEC, LLC - CA 2016-08-15 yes yes
209-619 AT&T NEW CINGULAR WIRELESS PCS, LLC 2020-09-24 yes yes
209-675 AT&T NEW CINGULAR WIRELESS PCS, LLC – yes yes
209-704 AT&T NEW CINGULAR WIRELESS PCS, LLC – yes yes
209-710 Comcast COMCAST PHONE OF CALIFORNIA, LLC – yes yes
209-737 Lumen CENTURYLINK COMMUNICATIONS, LLC 2013-11-08 yes yes
209-752 T-Mobile T-MOBILE USA, INC. 2002-03-21 yes yes
209-826 AT&T PACIFIC BELL – no yes
209-827 AT&T PACIFIC BELL – no yes
209-828 Onvoy ONVOY, LLC - CA – yes yes
209-829 AT&T PACIFIC BELL – yes yes
209-979 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA – 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 3 17.6%
NEW CINGULAR WIRELESS PCS, LLC AT&T 3 17.6%
PACIFIC BELL AT&T 3 17.6%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA Verizon 2 11.8%
AMERICAN MESSAGING SERVICES, LLC American Messaging 1 5.9%
METROPCS, INC. T-Mobile 1 5.9%
BANDWIDTH.COM CLEC, LLC - CA Bandwidth 1 5.9%
COMCAST PHONE OF CALIFORNIA, LLC Comcast 1 5.9%
CENTURYLINK COMMUNICATIONS, LLC Lumen 1 5.9%
ONVOY, LLC - CA Onvoy 1 5.9%

Frequently asked

Which prefixes belong to LOS BANOS in area code 209?

17 blocks: 270, 509, 516, 519, 587, 592, 619, 675, 704, 710, 737, 752 and 5 more, all listed in the table above.

Which carriers have numbers in LOS BANOS?

T-MOBILE USA, INC. (3 blocks), NEW CINGULAR WIRELESS PCS, LLC (3 blocks), PACIFIC BELL (3 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (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 LOS BANOS 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