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

OKLD FRTVL prefixes in area code 510

NANPA records 39 assigned NXX blocks to rate center OKLD FRTVL in area code 510, 5.0% 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. 13 holders hold those blocks, the largest being PACIFIC BELL (13), T-MOBILE USA, INC. (8), METROPCS, INC. (4). The earliest assignment on record here is 2001-01-25 and the most recent 2019-09-27. 29 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 341 – overlay codes cover the same geography, so a rate center is served by all of them.

39 assigned blocks – 5% of 510
13 holders of record
29 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
510-213 T-Mobile T-MOBILE USA, INC. 2002-09-19 yes yes
510-216 T-Mobile T-MOBILE USA, INC. 2019-09-27 yes yes
510-228 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
510-261 AT&T PACIFIC BELL – no yes
510-269 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA – yes yes
510-328 T-Mobile T-MOBILE USA, INC. 2013-01-31 yes yes
510-336 AT&T PACIFIC BELL – yes yes
510-395 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA – yes yes
510-422 T-Mobile T-MOBILE USA, INC. 2015-09-25 yes yes
510-424 T-Mobile T-MOBILE USA, INC. 2016-07-29 yes yes
510-434 AT&T PACIFIC BELL – yes yes
510-436 AT&T PACIFIC BELL – no yes
510-437 AT&T PACIFIC BELL – yes yes
510-467 Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA – yes yes
510-479 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA – yes yes
510-482 AT&T PACIFIC BELL – no yes
510-485 T-Mobile METROPCS, INC. – yes yes
510-488 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
510-500 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
510-530 AT&T PACIFIC BELL – no yes
510-531 AT&T PACIFIC BELL – no yes
510-532 AT&T PACIFIC BELL – no yes
510-533 AT&T PACIFIC BELL – no yes
510-534 AT&T PACIFIC BELL – no yes
510-535 AT&T PACIFIC BELL – no yes
510-536 AT&T PACIFIC BELL – no yes
510-561 AT&T NEW CINGULAR WIRELESS PCS, LLC 2017-04-14 yes yes
510-603 Comcast COMCAST PHONE OF CALIFORNIA, LLC 2018-02-20 yes yes
510-689 T-Mobile METROPCS, INC. 2001-04-20 yes yes
510-696 T-Mobile T-MOBILE USA, INC. 2015-06-22 yes yes
510-698 TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS – yes yes
510-838 Bandwidth BANDWIDTH.COM CLEC, LLC - CA 2014-02-28 yes yes
510-842 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
510-866 T-Mobile METROPCS, INC. 2001-01-25 yes yes
510-927 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
510-930 Peerless PEERLESS NETWORK OF CALIFORNIA, LLC - CA 2018-09-20 yes yes
510-934 T-Mobile T-MOBILE USA, INC. 2015-03-11 yes yes
510-967 T-Mobile METROPCS, INC. – yes yes
510-988 T-Mobile T-MOBILE USA, INC. 2019-03-21 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 13 33.3%
T-MOBILE USA, INC. T-Mobile 8 20.5%
METROPCS, INC. T-Mobile 4 10.3%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC Verizon 3 7.7%
LEVEL 3 COMMUNICATIONS, LLC - CA Lumen 2 5.1%
TELEPORT COMMUNICATIONS AMERICA, LLC - CA AT&T 2 5.1%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA Verizon 1 2.6%
LEVEL 3 TELECOM OF CALIFORNIA, LP - CA Lumen 1 2.6%
NEW CINGULAR WIRELESS PCS, LLC AT&T 1 2.6%
COMCAST PHONE OF CALIFORNIA, LLC Comcast 1 2.6%
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS TPx 1 2.6%
BANDWIDTH.COM CLEC, LLC - CA Bandwidth 1 2.6%
PEERLESS NETWORK OF CALIFORNIA, LLC - CA Peerless 1 2.6%

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 OKLD FRTVL in area code 510?

39 blocks: 213, 216, 228, 261, 269, 328, 336, 395, 422, 424, 434, 436 and 27 more, all listed in the table above.

Which carriers have numbers in OKLD FRTVL?

PACIFIC BELL (13 blocks), T-MOBILE USA, INC. (8 blocks), METROPCS, INC. (4 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (3 blocks), LEVEL 3 COMMUNICATIONS, LLC - CA (2 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - 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 OKLD FRTVL 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 510

All 785 prefixes in 510