Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
WALNUT CRK prefixes in area code 925
NANPA records 103 assigned NXX blocks to rate center WALNUT CRK in area code 925, 16.1% of the 640 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. 24 holders hold those blocks, the largest being PACIFIC BELL (35), NEW CINGULAR WIRELESS PCS, LLC (10), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (9). The earliest assignment on record here is 2001-01-26 and the most recent 2026-08-20. 54 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.
103 assigned blocks – 16.1% of 925
24 holders of record
54 of them pooled in 1,000-number lots
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 925-210 | AT&T PACIFIC BELL | – | no | yes |
| 925-212 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 925-213 | Spok SPOK, INC. | – | no | yes |
| 925-214 | Peerless PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 2016-09-10 | yes | yes |
| 925-221 | 33 WIRELESS INC. | – | no | yes |
| 925-239 | Peerless PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 2013-03-25 | yes | yes |
| 925-256 | AT&T PACIFIC BELL | – | no | yes |
| 925-260 | T-Mobile METROPCS, INC. | – | yes | yes |
| 925-262 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 925-266 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2016-05-02 | yes | yes |
| 925-274 | AT&T PACIFIC BELL | – | no | yes |
| 925-278 | Comcast COMCAST PHONE OF CALIFORNIA, LLC | 2013-10-24 | yes | yes |
| 925-279 | AT&T PACIFIC BELL | – | no | yes |
| 925-280 | AT&T PACIFIC BELL | – | no | yes |
| 925-285 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 925-286 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 925-287 | AT&T PACIFIC BELL | – | no | yes |
| 925-289 | Onvoy ONVOY, LLC - CA | 2009-02-23 | yes | yes |
| 925-295 | AT&T PACIFIC BELL | – | no | yes |
| 925-296 | AT&T PACIFIC BELL | – | no | yes |
| 925-300 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 925-322 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2011-05-10 | yes | yes |
| 925-323 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 925-324 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2002-08-21 | yes | yes |
| 925-330 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-11-30 | yes | yes |
| 925-333 | American Messaging AMERICAN MESSAGING SERVICES, LLC | – | no | yes |
| 925-340 | Spok SPOK, INC. | – | no | yes |
| 925-342 | COMMIO, LLC | – | yes | yes |
| 925-357 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | 2011-09-13 | yes | yes |
| 925-360 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 925-378 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2014-12-11 | yes | yes |
| 925-393 | Onvoy ONVOY, LLC - CA | 2015-06-16 | yes | yes |
| 925-395 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | – | yes | yes |
| 925-407 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 925-430 | Comcast COMCAST PHONE OF CALIFORNIA, LLC | 2019-10-09 | yes | yes |
| 925-433 | Comcast COMCAST PHONE OF CALIFORNIA, LLC | 2015-11-02 | yes | yes |
| 925-440 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2018-11-02 | yes | yes |
| 925-448 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2014-04-28 | yes | yes |
| 925-451 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | yes | yes |
| 925-457 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 925-464 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2012-08-16 | yes | yes |
| 925-465 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | no | yes |
| 925-472 | AT&T PACIFIC BELL | – | no | yes |
| 925-476 | MATRIX TELECOM, LLC. S/I/I TNCI - CA | – | yes | yes |
| 925-478 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 925-482 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 925-488 | Peerless PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 2019-06-24 | yes | yes |
| 925-512 | Onvoy ONVOY, LLC - CA | 2023-10-02 | yes | yes |
| 925-527 | UTILITY TELECOM GROUP, LLC - CA | – | yes | yes |
| 925-532 | Telnyx TELNYX LLC | 2017-03-17 | yes | yes |
| 925-542 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2017-12-26 | yes | yes |
| 925-546 | TON80 COMMUNICATIONS, LLC | 2022-01-07 | yes | yes |
| 925-588 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 925-627 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 2001-03-27 | yes | yes |
| 925-639 | T-Mobile T-MOBILE USA, INC. | 2001-10-18 | no | yes |
| 925-651 | T-Mobile T-MOBILE USA, INC. | 2026-08-20 | yes | yes |
| 925-658 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | – | yes | yes |
| 925-705 | T-Mobile METROPCS, INC. | 2001-08-22 | yes | yes |
| 925-708 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2001-01-26 | no | yes |
| 925-722 | FRACTEL, LLC | 2021-07-07 | yes | yes |
| 925-744 | FRACTEL, LLC | 2020-11-13 | yes | yes |
| 925-746 | AT&T PACIFIC BELL | – | no | yes |
| 925-765 | T-Mobile METROPCS, INC. | – | yes | yes |
| 925-766 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 925-788 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 925-817 | AT&T PACIFIC BELL | – | yes | yes |
| 925-818 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | yes | yes |
| 925-876 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 925-891 | MATRIX TELECOM, LLC. S/I/I TNCI - CA | – | yes | yes |
| 925-899 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 925-906 | AT&T PACIFIC BELL | – | no | yes |
| 925-920 | Spok SPOK, INC. | – | no | yes |
| 925-926 | AT&T PACIFIC BELL | – | no | yes |
| 925-927 | AT&T PACIFIC BELL | – | no | yes |
| 925-930 | AT&T PACIFIC BELL | – | no | yes |
| 925-932 | AT&T PACIFIC BELL | – | no | yes |
| 925-933 | AT&T PACIFIC BELL | – | no | yes |
| 925-934 | AT&T PACIFIC BELL | – | no | yes |
| 925-935 | AT&T PACIFIC BELL | – | no | yes |
| 925-937 | AT&T PACIFIC BELL | – | no | yes |
| 925-938 | AT&T PACIFIC BELL | – | no | yes |
| 925-939 | AT&T PACIFIC BELL | – | no | yes |
| 925-940 | Onvoy ONVOY, LLC - CA | – | no | yes |
| 925-941 | AT&T PACIFIC BELL | – | yes | yes |
| 925-942 | AT&T PACIFIC BELL | – | no | yes |
| 925-943 | AT&T PACIFIC BELL | – | no | yes |
| 925-944 | AT&T PACIFIC BELL | – | no | yes |
| 925-945 | AT&T PACIFIC BELL | – | no | yes |
| 925-946 | AT&T PACIFIC BELL | – | no | yes |
| 925-947 | AT&T PACIFIC BELL | – | no | yes |
| 925-948 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | yes | yes |
| 925-949 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | – | yes | yes |
| 925-951 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 925-952 | AT&T PACIFIC BELL | – | yes | yes |
| 925-953 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | – | yes | yes |
| 925-954 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 925-955 | UTILITY TELECOM GROUP, LLC - CA | – | no | yes |
| 925-956 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 925-974 | AT&T PACIFIC BELL | – | no | yes |
| 925-975 | AT&T PACIFIC BELL | – | no | yes |
| 925-977 | AT&T PACIFIC BELL | – | no | yes |
| 925-979 | AT&T PACIFIC BELL | – | yes | yes |
| 925-988 | AT&T PACIFIC BELL | – | no | 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 | 35 | 34% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 10 | 9.7% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | Verizon | 9 | 8.7% |
| T-MOBILE USA, INC. | T-Mobile | 5 | 4.9% |
| LEVEL 3 COMMUNICATIONS, LLC - CA | Lumen | 4 | 3.9% |
| ONVOY, LLC - CA | Onvoy | 4 | 3.9% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 4 | 3.9% |
| SPOK, INC. | Spok | 3 | 2.9% |
| PEERLESS NETWORK OF CALIFORNIA, LLC - CA | Peerless | 3 | 2.9% |
| METROPCS, INC. | T-Mobile | 3 | 2.9% |
| COMCAST PHONE OF CALIFORNIA, LLC | Comcast | 3 | 2.9% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | AT&T | 3 | 2.9% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 3 | 2.9% |
| MATRIX TELECOM, LLC. S/I/I TNCI - CA | – | 2 | 1.9% |
| UTILITY TELECOM GROUP, LLC - CA | – | 2 | 1.9% |
| FRACTEL, LLC | – | 2 | 1.9% |
| 33 WIRELESS INC. | – | 1 | 1% |
| BANDWIDTH.COM CLEC, LLC - CA | Bandwidth | 1 | 1% |
| AMERICAN MESSAGING SERVICES, LLC | American Messaging | 1 | 1% |
| COMMIO, LLC | – | 1 | 1% |
| TELNYX LLC | Telnyx | 1 | 1% |
| TON80 COMMUNICATIONS, LLC | – | 1 | 1% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | Verizon | 1 | 1% |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | Lumen | 1 | 1% |
Frequently asked
Which prefixes belong to WALNUT CRK in area code 925?
103 blocks: 210, 212, 213, 214, 221, 239, 256, 260, 262, 266, 274, 278 and 91 more, all listed in the table above.
Which carriers have numbers in WALNUT CRK?
PACIFIC BELL (35 blocks), NEW CINGULAR WIRELESS PCS, LLC (10 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (9 blocks), T-MOBILE USA, INC. (5 blocks), LEVEL 3 COMMUNICATIONS, LLC - CA (4 blocks), ONVOY, LLC - CA (4 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is WALNUT CRK 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.