Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
RIVERSIDE prefixes in area code 951
NANPA records 148 assigned NXX blocks to rate center RIVERSIDE in area code 951, 21.3% 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. 19 holders hold those blocks, the largest being PACIFIC BELL (29), NEW CINGULAR WIRELESS PCS, LLC (28), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (22). The earliest assignment on record here is 2001-01-26 and the most recent 2023-12-28. 86 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 319, 708, 856, 909 – overlay codes cover the same geography, so a rate center is served by all of them.
148 assigned blocks – 21.3% of 951
19 holders of record
86 of them pooled in 1,000-number lots
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 951-201 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 951-202 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 951-203 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 951-204 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 951-205 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 951-206 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 951-212 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 951-213 | T-Mobile T-MOBILE USA, INC. | 2007-01-17 | yes | yes |
| 951-217 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 951-218 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 951-222 | AT&T PACIFIC BELL | – | yes | yes |
| 951-224 | T-Mobile METROPCS NETWORKS, LLC | 2007-03-20 | yes | yes |
| 951-231 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 951-232 | T-Mobile METROPCS NETWORKS, LLC | – | yes | yes |
| 951-233 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 951-235 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 951-236 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-04-19 | no | yes |
| 951-237 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 951-241 | T-Mobile METROPCS NETWORKS, LLC | 2007-09-27 | yes | yes |
| 951-248 | AT&T PACIFIC BELL | – | no | yes |
| 951-250 | T-Mobile METROPCS NETWORKS, LLC | 2007-07-13 | yes | yes |
| 951-255 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 951-261 | T-Mobile METROPCS NETWORKS, LLC | 2008-12-11 | yes | yes |
| 951-263 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | 2009-01-31 | yes | yes |
| 951-266 | Peerless PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 2009-02-11 | yes | yes |
| 951-274 | AT&T PACIFIC BELL | – | no | yes |
| 951-275 | AT&T PACIFIC BELL | – | yes | yes |
| 951-276 | AT&T PACIFIC BELL | – | no | yes |
| 951-286 | T-Mobile METROPCS NETWORKS, LLC | 2009-09-03 | yes | yes |
| 951-288 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-04-19 | no | yes |
| 951-289 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | 2010-01-13 | yes | yes |
| 951-295 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 951-300 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 951-312 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-04-19 | no | yes |
| 951-313 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-04-19 | no | yes |
| 951-315 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-04-19 | no | yes |
| 951-318 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-04-19 | no | yes |
| 951-320 | AT&T PACIFIC BELL | – | no | yes |
| 951-321 | AT&T PACIFIC BELL | – | yes | yes |
| 951-323 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-04-19 | no | yes |
| 951-328 | AT&T PACIFIC BELL | – | no | yes |
| 951-329 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 951-333 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-04-30 | no | yes |
| 951-334 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 951-335 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2011-07-25 | yes | yes |
| 951-341 | AT&T PACIFIC BELL | – | no | yes |
| 951-342 | AT&T PACIFIC BELL | – | yes | yes |
| 951-344 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | – | no | yes |
| 951-346 | MATRIX TELECOM, LLC. S/I/I TNCI - CA | – | yes | yes |
| 951-347 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 951-367 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 951-368 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | – | yes | yes |
| 951-369 | AT&T PACIFIC BELL | – | no | yes |
| 951-374 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2013-04-08 | yes | yes |
| 951-377 | T-Mobile T-MOBILE USA, INC. | 2001-09-19 | yes | yes |
| 951-384 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | 2013-10-08 | yes | yes |
| 951-394 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2014-05-23 | yes | yes |
| 951-405 | T-Mobile T-MOBILE USA, INC. | 2016-03-04 | yes | yes |
| 951-410 | T-Mobile T-MOBILE USA, INC. | 2016-08-09 | yes | yes |
| 951-425 | T-Mobile METROPCS NETWORKS, LLC | 2014-09-22 | yes | yes |
| 951-452 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-04-19 | no | yes |
| 951-453 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 951-462 | T-Mobile T-MOBILE USA, INC. | 2015-02-18 | yes | yes |
| 951-465 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | – | yes | yes |
| 951-495 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2016-09-21 | yes | yes |
| 951-500 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2003-05-30 | yes | yes |
| 951-504 | American Messaging AMERICAN MESSAGING SERVICES, LLC | – | no | yes |
| 951-505 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 951-512 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2018-01-24 | yes | yes |
| 951-521 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2020-03-18 | yes | yes |
| 951-522 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 951-529 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 951-530 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 951-533 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 951-534 | Charter CHARTER IP ENABLED SERVICES, LLC | 2005-01-24 | yes | yes |
| 951-536 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 951-538 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 951-542 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2020-08-05 | yes | yes |
| 951-543 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 951-544 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 951-548 | T-Mobile T-MOBILE USA, INC. | 2020-09-01 | yes | yes |
| 951-554 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2020-09-08 | yes | yes |
| 951-558 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2020-10-28 | yes | yes |
| 951-560 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2020-12-09 | yes | yes |
| 951-568 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2020-12-16 | yes | yes |
| 951-573 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2020-12-16 | yes | yes |
| 951-584 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2021-04-29 | yes | yes |
| 951-586 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2021-07-29 | yes | yes |
| 951-589 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2021-07-29 | yes | yes |
| 951-592 | Onvoy ONVOY, LLC - CA | 2021-11-04 | yes | yes |
| 951-618 | Onvoy ONVOY, LLC - CA | 2022-09-08 | yes | yes |
| 951-631 | Onvoy ONVOY, LLC - CA | 2023-05-19 | yes | yes |
| 951-640 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 951-660 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 951-662 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 951-675 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 951-680 | AT&T PACIFIC BELL | – | yes | yes |
| 951-682 | AT&T PACIFIC BELL | – | no | yes |
| 951-683 | AT&T PACIFIC BELL | – | no | yes |
| 951-684 | AT&T PACIFIC BELL | – | no | yes |
| 951-686 | AT&T PACIFIC BELL | – | no | yes |
| 951-712 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 951-715 | AT&T PACIFIC BELL | – | no | yes |
| 951-717 | COMMIO, LLC | 2023-12-28 | yes | yes |
| 951-732 | T-Mobile METROPCS NETWORKS, LLC | 2008-05-13 | yes | yes |
| 951-742 | T-Mobile T-MOBILE USA, INC. | 2005-12-16 | yes | yes |
| 951-743 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 951-750 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | – | yes | yes |
| 951-756 | T-Mobile T-MOBILE USA, INC. | 2002-10-17 | yes | yes |
| 951-758 | Onvoy ONVOY, LLC - CA | 2017-03-23 | yes | yes |
| 951-774 | AT&T PACIFIC BELL | – | no | yes |
| 951-777 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | – | yes | yes |
| 951-778 | AT&T PACIFIC BELL | – | no | yes |
| 951-779 | AT&T PACIFIC BELL | – | no | yes |
| 951-781 | AT&T PACIFIC BELL | – | no | yes |
| 951-782 | AT&T PACIFIC BELL | – | yes | yes |
| 951-783 | Charter CHARTER IP ENABLED SERVICES, LLC | 2016-12-19 | yes | yes |
| 951-784 | AT&T PACIFIC BELL | – | no | yes |
| 951-786 | AT&T PACIFIC BELL | – | yes | yes |
| 951-787 | AT&T PACIFIC BELL | – | no | yes |
| 951-788 | AT&T PACIFIC BELL | – | no | yes |
| 951-801 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | 2005-09-12 | yes | yes |
| 951-809 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 951-823 | T-Mobile T-MOBILE USA, INC. | 2006-09-18 | yes | yes |
| 951-824 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 951-826 | AT&T PACIFIC BELL | – | yes | yes |
| 951-827 | AT&T PACIFIC BELL | – | no | yes |
| 951-830 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 951-836 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2001-10-19 | no | yes |
| 951-848 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | – | yes | yes |
| 951-850 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-11-08 | no | yes |
| 951-866 | FRACTEL, LLC | 2021-02-25 | yes | yes |
| 951-877 | FRACTEL, LLC | 2019-05-13 | yes | yes |
| 951-880 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 2005-06-19 | yes | yes |
| 951-888 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | – | yes | yes |
| 951-892 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 2003-04-21 | yes | yes |
| 951-897 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 951-899 | FRACTEL, LLC | 2020-11-06 | yes | yes |
| 951-900 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 951-905 | T-Mobile T-MOBILE USA, INC. | 2001-05-03 | yes | yes |
| 951-906 | T-Mobile T-MOBILE USA, INC. | 2002-06-14 | yes | yes |
| 951-907 | T-Mobile T-MOBILE USA, INC. | 2002-04-15 | no | yes |
| 951-941 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2005-12-29 | yes | yes |
| 951-955 | AT&T PACIFIC BELL | – | no | yes |
| 951-961 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-04-30 | no | yes |
| 951-965 | T-Mobile T-MOBILE USA, INC. | 2001-01-26 | yes | yes |
| 951-966 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 951-990 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | 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 | 29 | 19.6% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 28 | 18.9% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | Verizon | 22 | 14.9% |
| T-MOBILE USA, INC. | T-Mobile | 22 | 14.9% |
| METROPCS NETWORKS, LLC | T-Mobile | 8 | 5.4% |
| BANDWIDTH.COM CLEC, LLC - CA | Bandwidth | 8 | 5.4% |
| LEVEL 3 COMMUNICATIONS, LLC - CA | Lumen | 7 | 4.7% |
| ONVOY, LLC - CA | Onvoy | 5 | 3.4% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 3 | 2% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | AT&T | 3 | 2% |
| FRACTEL, LLC | – | 3 | 2% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 2 | 1.4% |
| CHARTER IP ENABLED SERVICES, LLC | Charter | 2 | 1.4% |
| PEERLESS NETWORK OF CALIFORNIA, LLC - CA | Peerless | 1 | 0.7% |
| MATRIX TELECOM, LLC. S/I/I TNCI - CA | – | 1 | 0.7% |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | Lumen | 1 | 0.7% |
| AMERICAN MESSAGING SERVICES, LLC | American Messaging | 1 | 0.7% |
| COMMIO, LLC | – | 1 | 0.7% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | Verizon | 1 | 0.7% |
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 RIVERSIDE in area code 951?
148 blocks: 201, 202, 203, 204, 205, 206, 212, 213, 217, 218, 222, 224 and 136 more, all listed in the table above.
Which carriers have numbers in RIVERSIDE?
PACIFIC BELL (29 blocks), NEW CINGULAR WIRELESS PCS, LLC (28 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (22 blocks), T-MOBILE USA, INC. (22 blocks), METROPCS NETWORKS, LLC (8 blocks), BANDWIDTH.COM CLEC, LLC - CA (8 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is RIVERSIDE 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.