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
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Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 951-352 | PACIFIC BELL | 9740 | ARLINGTON | CA | |
| 951-353 | PACIFIC BELL | 9740 | ARLINGTON | CA | |
| 951-354 | PACIFIC BELL | 9740 | ARLINGTON | CA | |
| 951-356 | ONVOY, LLC - CA | 649C | CORONA | CA | |
| 951-358 | PACIFIC BELL | 9740 | ARLINGTON | CA | |
| 951-359 | PACIFIC BELL | 9740 | ARLINGTON | CA | |
| 951-360 | PACIFIC BELL | 9740 | MIRA LOMA | CA | |
| 951-361 | PACIFIC BELL | 9740 | MIRA LOMA | CA | |
| 951-362 | UTILITY TELECOM GROUP, LLC - CA | 9262 | MIRA LOMA | CA | |
| 951-367 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | RIVERSIDE | CA | |
| 951-368 | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | RIVERSIDE | CA | |
| 951-369 | PACIFIC BELL | 9740 | RIVERSIDE | CA | |
| 951-371 | PACIFIC BELL | 9740 | CORONA | CA | |
| 951-372 | PACIFIC BELL | 9740 | CORONA | CA | |
| 951-375 | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | TEMECULA | CA | |
| 951-378 | T-MOBILE USA, INC. | 6529 | PERRIS | CA | |
| 951-382 | BANDWIDTH.COM CLEC, LLC - CA | 981E | TEMSCL CNY | CA | |
| 951-389 | ONVOY, LLC - CA | 649C | HEMT ANZA | CA | |
| 951-400 | ONVOY, LLC - CA | 649C | PERRIS | CA | |
| 951-402 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | BANNING | CA | |
| 951-411 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | CA | |
| 951-413 | FRONTIER CALIFORNIA INC. | 2319 | MORENO | CA | |
| 951-415 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CORONA | CA | |
| 951-426 | T-MOBILE USA, INC. | 6529 | HEMT SNJC | CA | |
| 951-431 | PACIFIC BELL | 9740 | COLTON | CA | |
| 951-436 | T-MOBILE USA, INC. | 6529 | PERRIS | CA | |
| 951-440 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | MURRIETA | CA | |
| 951-442 | T-MOBILE USA, INC. | 6529 | PERRIS | CA | |
| 951-443 | FRONTIER CALIFORNIA INC. | 2319 | PERRIS | CA | |
| 951-444 | BANDWIDTH.COM CLEC, LLC - CA | 981E | CORONA | CA | |
| 951-453 | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA | |
| 951-461 | FRONTIER CALIFORNIA INC. | 2319 | MURRIETA | CA | |
| 951-465 | BANDWIDTH.COM CLEC, LLC - CA | 981E | RIVERSIDE | CA | |
| 951-471 | FRONTIER CALIFORNIA INC. | 2319 | ELSINORE | CA | |
| 951-473 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | MURRIETA | CA | |
| 951-479 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CORONA | CA | |
| 951-485 | FRONTIER CALIFORNIA INC. | 2319 | MORENO | CA | |
| 951-486 | FRONTIER CALIFORNIA INC. | 2319 | MORENO | CA | |
| 951-487 | FRONTIER CALIFORNIA INC. | 2319 | HEMT SNJC | CA | |
| 951-488 | FRONTIER CALIFORNIA INC. | 2319 | MORENO | CA | |
| 951-490 | FRONTIER CALIFORNIA INC. | 2319 | PERRIS | CA | |
| 951-491 | FRONTIER CALIFORNIA INC. | 2319 | TEMECULA | CA | |
| 951-492 | FRONTIER CALIFORNIA INC. | 2319 | HEMT HEMT | CA | |
| 951-493 | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | CORONA | CA | |
| 951-501 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TEMECULA | CA | |
| 951-504 | AMERICAN MESSAGING SERVICES, LLC | 9748 | RIVERSIDE | CA | |
| 951-505 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | RIVERSIDE | CA | |
| 951-506 | FRONTIER CALIFORNIA INC. | 2319 | TEMECULA | CA | |
| 951-509 | PACIFIC BELL | 9740 | ARLINGTON | CA | |
| 951-511 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | 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.