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

BARSTOW prefixes in area code 760

NANPA records 16 assigned NXX blocks to rate center BARSTOW in area code 760, 2.0% of the 785 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 FRONTIER CALIFORNIA INC. (5), NEW CINGULAR WIRELESS PCS, LLC (2), BANDWIDTH.COM CLEC, LLC - CA (2). The earliest assignment on record here is 2001-04-19 and the most recent 2013-03-12. 12 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 442 – overlay codes cover the same geography, so a rate center is served by all of them.

16 assigned blocks – 2% of 760
10 holders of record
12 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
760-252 Frontier FRONTIER CALIFORNIA INC. – no yes
760-255 Frontier FRONTIER CALIFORNIA INC. – no yes
760-256 Frontier FRONTIER CALIFORNIA INC. – no yes
760-267 AT&T NEW CINGULAR WIRELESS PCS, LLC 2001-08-22 yes yes
760-282 Bandwidth BANDWIDTH.COM CLEC, LLC - CA – yes yes
760-308 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
760-447 AT&T NEW CINGULAR WIRELESS PCS, LLC 2001-04-19 no yes
760-577 Frontier FRONTIER CALIFORNIA INC. – yes yes
760-590 T-Mobile METROPCS NETWORKS, LLC 2001-06-27 yes yes
760-606 Onvoy ONVOY, LLC - CA – yes yes
760-678 Bandwidth BANDWIDTH.COM CLEC, LLC - CA 2010-06-11 yes yes
760-718 Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA – yes yes
760-818 Charter TWC IP ENABLED SERVICES, LLC 2013-03-12 yes yes
760-957 Frontier FRONTIER CALIFORNIA INC. – yes yes
760-979 T-Mobile T-MOBILE USA, INC. 2011-03-29 yes yes
760-988 UTILITY TELECOM GROUP, LLC - 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
FRONTIER CALIFORNIA INC. Frontier 5 31.2%
NEW CINGULAR WIRELESS PCS, LLC AT&T 2 12.5%
BANDWIDTH.COM CLEC, LLC - CA Bandwidth 2 12.5%
LEVEL 3 COMMUNICATIONS, LLC - CA Lumen 1 6.2%
METROPCS NETWORKS, LLC T-Mobile 1 6.2%
ONVOY, LLC - CA Onvoy 1 6.2%
LEVEL 3 TELECOM OF CALIFORNIA, LP - CA Lumen 1 6.2%
TWC IP ENABLED SERVICES, LLC Charter 1 6.2%
T-MOBILE USA, INC. T-Mobile 1 6.2%
UTILITY TELECOM GROUP, LLC - CA – 1 6.2%

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 BARSTOW in area code 760?

16 blocks: 252, 255, 256, 267, 282, 308, 447, 577, 590, 606, 678, 718 and 4 more, all listed in the table above.

Which carriers have numbers in BARSTOW?

FRONTIER CALIFORNIA INC. (5 blocks), NEW CINGULAR WIRELESS PCS, LLC (2 blocks), BANDWIDTH.COM CLEC, LLC - CA (2 blocks), LEVEL 3 COMMUNICATIONS, LLC - CA (1 block), METROPCS NETWORKS, LLC (1 block), ONVOY, 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 BARSTOW 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 760

All 785 prefixes in 760