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

SAN PEDRO prefixes in area code 424

NANPA records 32 assigned NXX blocks to rate center SAN PEDRO in area code 424, 7.0% of the 460 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. 14 holders hold those blocks, the largest being T-MOBILE USA, INC. (9), NEW CINGULAR WIRELESS PCS, LLC (5), ONVOY, LLC - CA (4). The earliest assignment on record here is 2006-03-23 and the most recent 2026-08-19. 32 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 310 – overlay codes cover the same geography, so a rate center is served by all of them.

32 assigned blocks – 7% of 424
14 holders of record
32 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
424-210 T-Mobile T-MOBILE USA, INC. 2006-12-18 yes yes
424-215 T-Mobile T-MOBILE USA, INC. 2007-01-25 yes yes
424-224 T-Mobile METROPCS NETWORKS, LLC 2007-03-21 yes yes
424-264 AT&T AT&T ENTERPRISES, LLC 2006-03-23 yes yes
424-267 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC 2010-11-19 yes yes
424-287 T-Mobile T-MOBILE USA, INC. 2012-12-14 yes yes
424-308 T-Mobile T-MOBILE USA, INC. 2016-04-29 yes yes
424-339 Onvoy ONVOY, LLC - CA 2015-03-23 yes yes
424-342 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
424-364 T-Mobile T-MOBILE USA, INC. 2014-09-15 yes yes
424-368 Onvoy ONVOY, LLC - CA – yes yes
424-417 TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 2018-07-03 yes yes
424-450 AT&T NEW CINGULAR WIRELESS PCS, LLC 2019-07-17 yes yes
424-451 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2021-07-30 yes yes
424-462 T-Mobile T-MOBILE USA, INC. 2021-11-18 yes yes
424-473 T-Mobile T-MOBILE USA, INC. 2022-02-10 yes yes
424-477 Charter CHARTER IP ENABLED SERVICES, LLC 2006-06-20 yes yes
424-482 T-Mobile T-MOBILE USA, INC. 2022-08-15 yes yes
424-489 T-Mobile T-MOBILE USA, INC. 2018-01-10 yes yes
424-494 AT&T NEW CINGULAR WIRELESS PCS, LLC 2023-07-14 yes yes
424-505 AT&T NEW CINGULAR WIRELESS PCS, LLC 2024-01-25 yes yes
424-517 Bandwidth BANDWIDTH.COM CLEC, LLC - CA 2024-09-09 yes yes
424-533 AT&T NEW CINGULAR WIRELESS PCS, LLC 2015-12-14 yes yes
424-534 AT&T NEW CINGULAR WIRELESS PCS, LLC 2024-11-25 yes yes
424-536 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2015-06-18 yes yes
424-540 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA 2025-01-03 yes yes
424-552 Onvoy ONVOY, LLC - CA – yes yes
424-570 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA 2009-12-16 yes yes
424-580 Onvoy ONVOY, LLC - CA 2026-08-19 yes no
424-703 T-Mobile METROPCS NETWORKS, LLC 2010-01-05 yes yes
424-772 Comcast COMCAST PHONE OF CALIFORNIA, LLC – yes yes
424-788 FRACTEL, LLC 2020-05-28 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 28.1%
NEW CINGULAR WIRELESS PCS, LLC AT&T 5 15.6%
ONVOY, LLC - CA Onvoy 4 12.5%
METROPCS NETWORKS, LLC T-Mobile 2 6.2%
LEVEL 3 COMMUNICATIONS, LLC - CA Lumen 2 6.2%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA Verizon 2 6.2%
AT&T ENTERPRISES, LLC AT&T 1 3.1%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC Verizon 1 3.1%
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS TPx 1 3.1%
CHARTER IP ENABLED SERVICES, LLC Charter 1 3.1%
BANDWIDTH.COM CLEC, LLC - CA Bandwidth 1 3.1%
TELEPORT COMMUNICATIONS AMERICA, LLC - CA AT&T 1 3.1%
COMCAST PHONE OF CALIFORNIA, LLC Comcast 1 3.1%
FRACTEL, LLC – 1 3.1%

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 SAN PEDRO in area code 424?

32 blocks: 210, 215, 224, 264, 267, 287, 308, 339, 342, 364, 368, 417 and 20 more, all listed in the table above.

Which carriers have numbers in SAN PEDRO?

T-MOBILE USA, INC. (9 blocks), NEW CINGULAR WIRELESS PCS, LLC (5 blocks), ONVOY, LLC - CA (4 blocks), METROPCS NETWORKS, LLC (2 blocks), LEVEL 3 COMMUNICATIONS, LLC - CA (2 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (2 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is SAN PEDRO 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 424

All 460 prefixes in 424