ARLINGTON prefixes in area code 951
NANPA records 50 assigned NXX blocks to rate center ARLINGTON in area code 951, 7.2% of the 696 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 PACIFIC BELL (15), T-MOBILE USA, INC. (11), NEW CINGULAR WIRELESS PCS, LLC (6). The earliest assignment on record here is 2001-05-03 and the most recent 2026-09-21. 40 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 229, 270, 334, 339 – overlay codes cover the same geography, so a rate center is served by all of them.
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 951-299 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 2010-11-19 | yes | yes |
| 951-307 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 951-324 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 951-343 | AT&T PACIFIC BELL | – | no | yes |
| 951-351 | AT&T PACIFIC BELL | – | no | yes |
| 951-352 | AT&T PACIFIC BELL | – | no | yes |
| 951-353 | AT&T PACIFIC BELL | – | no | yes |
| 951-354 | AT&T PACIFIC BELL | – | yes | yes |
| 951-358 | AT&T PACIFIC BELL | – | yes | yes |
| 951-359 | AT&T PACIFIC BELL | – | yes | yes |
| 951-373 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | 2011-08-09 | yes | yes |
| 951-376 | T-Mobile T-MOBILE USA, INC. | 2013-04-24 | yes | yes |
| 951-396 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2014-06-10 | yes | yes |
| 951-406 | Charter CHARTER IP ENABLED SERVICES, LLC | 2016-03-18 | yes | yes |
| 951-441 | T-Mobile T-MOBILE USA, INC. | 2016-12-01 | yes | yes |
| 951-446 | T-Mobile T-MOBILE USA, INC. | 2014-12-15 | yes | yes |
| 951-470 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2018-08-21 | yes | yes |
| 951-476 | T-Mobile T-MOBILE USA, INC. | 2015-09-16 | yes | yes |
| 951-509 | AT&T PACIFIC BELL | – | no | yes |
| 951-525 | T-Mobile T-MOBILE USA, INC. | 2009-11-30 | yes | yes |
| 951-539 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2019-11-15 | yes | yes |
| 951-552 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 951-556 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | yes | yes |
| 951-578 | T-Mobile T-MOBILE USA, INC. | 2021-02-19 | yes | yes |
| 951-588 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 951-598 | T-Mobile T-MOBILE USA, INC. | 2021-11-17 | yes | yes |
| 951-602 | AT&T PACIFIC BELL | – | yes | yes |
| 951-617 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2022-11-18 | yes | yes |
| 951-619 | SHELCOMM | 2004-08-12 | no | yes |
| 951-624 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2023-02-23 | yes | yes |
| 951-637 | AT&T PACIFIC BELL | – | yes | yes |
| 951-643 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | 2001-05-03 | yes | yes |
| 951-649 | T-Mobile T-MOBILE USA, INC. | 2023-09-26 | yes | yes |
| 951-687 | AT&T PACIFIC BELL | – | no | yes |
| 951-688 | AT&T PACIFIC BELL | – | no | yes |
| 951-689 | AT&T PACIFIC BELL | – | no | yes |
| 951-690 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2023-10-13 | yes | yes |
| 951-701 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2023-10-16 | yes | yes |
| 951-710 | AT&T PACIFIC BELL | – | yes | yes |
| 951-729 | IP HORIZON LLC | – | yes | yes |
| 951-731 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2024-05-02 | yes | yes |
| 951-762 | T-Mobile T-MOBILE USA, INC. | 2025-03-21 | yes | yes |
| 951-772 | T-Mobile T-MOBILE USA, INC. | 2015-03-20 | yes | yes |
| 951-785 | AT&T PACIFIC BELL | – | no | yes |
| 951-792 | T-Mobile T-MOBILE USA, INC. | 2025-06-18 | yes | yes |
| 951-814 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2026-06-10 | yes | yes |
| 951-828 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2026-09-21 | yes | no |
| 951-840 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | yes | yes |
| 951-944 | FRACTEL, LLC | 2021-07-13 | yes | yes |
| 951-977 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - 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
| Holder | Brand | Blocks | Share here |
|---|---|---|---|
| PACIFIC BELL | AT&T | 15 | 30% |
| T-MOBILE USA, INC. | T-Mobile | 11 | 22% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 6 | 12% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | Verizon | 5 | 10% |
| LEVEL 3 COMMUNICATIONS, LLC - CA | Lumen | 4 | 8% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 1 | 2% |
| ONVOY, LLC - CA | Onvoy | 1 | 2% |
| CHARTER IP ENABLED SERVICES, LLC | Charter | 1 | 2% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 1 | 2% |
| SHELCOMM | – | 1 | 2% |
| IP HORIZON LLC | – | 1 | 2% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | AT&T | 1 | 2% |
| FRACTEL, LLC | – | 1 | 2% |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | Lumen | 1 | 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 ARLINGTON in area code 951?
50 blocks: 299, 307, 324, 343, 351, 352, 353, 354, 358, 359, 373, 376 and 38 more, all listed in the table above.
Which carriers have numbers in ARLINGTON?
PACIFIC BELL (15 blocks), T-MOBILE USA, INC. (11 blocks), NEW CINGULAR WIRELESS PCS, LLC (6 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (5 blocks), LEVEL 3 COMMUNICATIONS, LLC - CA (4 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is ARLINGTON 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.