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

HOLLISTER prefixes in area code 831

NANPA records 22 assigned NXX blocks to rate center HOLLISTER in area code 831, 5.4% of the 406 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. 11 holders hold those blocks, the largest being PACIFIC BELL (6), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (3), NEW CINGULAR WIRELESS PCS, LLC (3). The earliest assignment on record here is 2001-09-12 and the most recent 2024-12-30. 18 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 208, 408, 986 – overlay codes cover the same geography, so a rate center is served by all of them.

22 assigned blocks – 5.4% of 831
11 holders of record
18 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
831-205 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA 2009-10-08 yes yes
831-207 T-Mobile T-MOBILE USA, INC. 2001-09-12 yes yes
831-245 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA – yes yes
831-265 AT&T AT&T ENTERPRISES, LLC 2008-04-02 yes yes
831-271 Telnyx TELNYX LLC 2021-06-23 yes yes
831-297 T-Mobile T-MOBILE USA, INC. 2001-12-14 yes yes
831-313 Charter CHARTER IP ENABLED SERVICES, LLC 2009-06-11 yes yes
831-327 AT&T NEW CINGULAR WIRELESS PCS, LLC 2024-12-30 yes yes
831-524 AT&T NEW CINGULAR WIRELESS PCS, LLC – yes yes
831-537 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA – yes yes
831-630 AT&T PACIFIC BELL – yes yes
831-634 AT&T PACIFIC BELL – yes yes
831-635 AT&T PACIFIC BELL – yes yes
831-636 AT&T PACIFIC BELL – no yes
831-637 AT&T PACIFIC BELL – no yes
831-638 AT&T PACIFIC BELL – no yes
831-664 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
831-665 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
831-673 AT&T NEW CINGULAR WIRELESS PCS, LLC – yes yes
831-801 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA – no yes
831-833 COMMIO, LLC 2022-02-24 yes yes
831-902 T-Mobile METROPCS, INC. – 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
PACIFIC BELL AT&T 6 27.3%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA Verizon 3 13.6%
NEW CINGULAR WIRELESS PCS, LLC AT&T 3 13.6%
T-MOBILE USA, INC. T-Mobile 2 9.1%
LEVEL 3 COMMUNICATIONS, LLC - CA Lumen 2 9.1%
TELEPORT COMMUNICATIONS AMERICA, LLC - CA AT&T 1 4.5%
AT&T ENTERPRISES, LLC AT&T 1 4.5%
TELNYX LLC Telnyx 1 4.5%
CHARTER IP ENABLED SERVICES, LLC Charter 1 4.5%
COMMIO, LLC – 1 4.5%
METROPCS, INC. T-Mobile 1 4.5%

Frequently asked

Which prefixes belong to HOLLISTER in area code 831?

22 blocks: 205, 207, 245, 265, 271, 297, 313, 327, 524, 537, 630, 634 and 10 more, all listed in the table above.

Which carriers have numbers in HOLLISTER?

PACIFIC BELL (6 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (3 blocks), NEW CINGULAR WIRELESS PCS, LLC (3 blocks), T-MOBILE USA, INC. (2 blocks), LEVEL 3 COMMUNICATIONS, LLC - CA (2 blocks), TELEPORT COMMUNICATIONS AMERICA, 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 HOLLISTER 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 831

All 406 prefixes in 831