NumberResearchRecent prefix assignments
352 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 2026-04
Which carriers received which NPA-NXX prefixes, and where. Assignments are initial assignments from NANPA records — because of number portability, the current serving carrier of individual numbers may differ. For finer-grained activity, see the thousands-block view above.
Most active assignees, last 30 days
New assignments by month
Sep 2026
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Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 951-256 | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | CORONA | CA | |
| 951-257 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | IDYLLWILD | CA | |
| 951-264 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CORONA | CA | |
| 951-265 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TEMECULA | CA | |
| 951-270 | PACIFIC BELL | 9740 | CORONA | CA | |
| 951-271 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CORONA | CA | |
| 951-272 | PACIFIC BELL | 9740 | CORONA | CA | |
| 951-273 | PACIFIC BELL | 9740 | CORONA | CA | |
| 951-274 | PACIFIC BELL | 9740 | RIVERSIDE | CA | |
| 951-275 | PACIFIC BELL | 9740 | RIVERSIDE | CA | |
| 951-276 | PACIFIC BELL | 9740 | RIVERSIDE | CA | |
| 951-277 | PACIFIC BELL | 9740 | TEMSCL CNY | CA | |
| 951-278 | PACIFIC BELL | 9740 | CORONA | CA | |
| 951-279 | PACIFIC BELL | 9740 | CORONA | CA | |
| 951-280 | PACIFIC BELL | 9740 | CORONA | CA | |
| 951-281 | MATRIX TELECOM, LLC. S/I/I TNCI - CA | 7379 | CORONA | CA | |
| 951-283 | T-MOBILE USA, INC. | 6529 | CORONA | CA | |
| 951-284 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | CORONA | CA | |
| 951-285 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ELSINORE | CA | |
| 951-294 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TEMECULA | CA | |
| 951-295 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | RIVERSIDE | CA | |
| 951-296 | FRONTIER CALIFORNIA INC. | 2319 | TEMECULA | CA | |
| 951-300 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | RIVERSIDE | CA | |
| 951-301 | FRONTIER CALIFORNIA INC. | 2319 | SUN CITY | CA | |
| 951-302 | FRONTIER CALIFORNIA INC. | 2319 | TEMECULA | CA | |
| 951-303 | FRONTIER CALIFORNIA INC. | 2319 | TEMECULA | CA | |
| 951-304 | FRONTIER CALIFORNIA INC. | 2319 | MURRIETA | CA | |
| 951-306 | FRONTIER CALIFORNIA INC. | 2319 | HEMT HEMT | CA | |
| 951-307 | ONVOY, LLC - CA | 649C | ARLINGTON | CA | |
| 951-308 | FRONTIER CALIFORNIA INC. | 2319 | TEMECULA | CA | |
| 951-311 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | CA | |
| 951-320 | PACIFIC BELL | 9740 | RIVERSIDE | CA | |
| 951-321 | PACIFIC BELL | 9740 | RIVERSIDE | CA | |
| 951-324 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ARLINGTON | CA | |
| 951-325 | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | HEMT HMLD | CA | |
| 951-326 | MATRIX TELECOM, LLC. S/I/I TNCI - CA | 7379 | TEMECULA | CA | |
| 951-327 | MATRIX TELECOM, LLC. S/I/I TNCI - CA | 7379 | HEMT SNJC | CA | |
| 951-328 | PACIFIC BELL | 9740 | RIVERSIDE | CA | |
| 951-329 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | RIVERSIDE | CA | |
| 951-334 | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA | |
| 951-336 | ONVOY, LLC - CA | 649C | CORONA | CA | |
| 951-340 | PACIFIC BELL | 9740 | CORONA | CA | |
| 951-341 | PACIFIC BELL | 9740 | RIVERSIDE | CA | |
| 951-342 | PACIFIC BELL | 9740 | RIVERSIDE | CA | |
| 951-343 | PACIFIC BELL | 9740 | ARLINGTON | CA | |
| 951-344 | BANDWIDTH.COM CLEC, LLC - CA | 981E | RIVERSIDE | CA | |
| 951-346 | MATRIX TELECOM, LLC. S/I/I TNCI - CA | 7379 | RIVERSIDE | CA | |
| 951-347 | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA | |
| 951-348 | ONVOY, LLC - CA | 649C | MURRIETA | CA | |
| 951-351 | PACIFIC BELL | 9740 | ARLINGTON | CA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 2026-04 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.