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 |
|---|---|---|---|---|---|
| 951-515 | T-MOBILE USA, INC. | 6529 | CORONA | CA | |
| 951-520 | PACIFIC BELL | 9740 | CORONA | CA | |
| 951-522 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIVERSIDE | CA | |
| 951-527 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | IDYLLWILD | CA | |
| 951-529 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | RIVERSIDE | CA | |
| 951-530 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | RIVERSIDE | CA | |
| 951-531 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | CORONA | CA | |
| 951-532 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CORONA | CA | |
| 951-533 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | RIVERSIDE | CA | |
| 951-536 | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA | |
| 951-537 | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | HEMT HEMT | CA | |
| 951-538 | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA | |
| 951-540 | ONVOY, LLC - CA | 649C | LAKEVIEWNU | CA | |
| 951-541 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | TEMECULA | CA | |
| 951-543 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | RIVERSIDE | CA | |
| 951-544 | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA | |
| 951-549 | PACIFIC BELL | 9740 | CORONA | CA | |
| 951-550 | T-MOBILE USA, INC. | 6529 | PERRIS | CA | |
| 951-552 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ARLINGTON | CA | |
| 951-555 | MULTIPLE OCN LISTING | MULT | DIR ASST | CA | |
| 951-556 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ARLINGTON | CA | |
| 951-561 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TEMSCL CNY | CA | |
| 951-565 | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | WOODCREST | CA | |
| 951-566 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SUN CITY | CA | |
| 951-567 | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | MORENO | CA | |
| 951-571 | PACIFIC BELL (COMPETITIVE) | 7480 | MORENO | CA | |
| 951-572 | PACIFIC BELL (COMPETITIVE) | 7480 | BANNING | CA | |
| 951-575 | T-MOBILE USA, INC. | 6529 | PERRIS | CA | |
| 951-582 | PACIFIC BELL | 9740 | CORONA | CA | |
| 951-587 | FRONTIER CALIFORNIA INC. | 2319 | TEMECULA | CA | |
| 951-588 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | ARLINGTON | CA | |
| 951-599 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HEMT HMLD | CA | |
| 951-600 | FRONTIER CALIFORNIA INC. | 2319 | MURRIETA | CA | |
| 951-601 | FRONTIER CALIFORNIA INC. | 2319 | MORENO | CA | |
| 951-602 | PACIFIC BELL | 9740 | ARLINGTON | CA | |
| 951-603 | IP HORIZON LLC | 515J | TEMSCL CNY | CA | |
| 951-609 | FRONTIER CALIFORNIA INC. | 2319 | ELSINORE | CA | |
| 951-611 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | CA | |
| 951-637 | PACIFIC BELL | 9740 | ARLINGTON | CA | |
| 951-639 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SUN CITY | CA | |
| 951-640 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIVERSIDE | CA | |
| 951-651 | ONVOY, LLC - CA | 649C | HEMT SNJC | CA | |
| 951-652 | FRONTIER CALIFORNIA INC. | 2319 | HEMT HEMT | CA | |
| 951-653 | FRONTIER CALIFORNIA INC. | 2319 | MORENO | CA | |
| 951-654 | FRONTIER CALIFORNIA INC. | 2319 | HEMT SNJC | CA | |
| 951-655 | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | MORENO | CA | |
| 951-656 | FRONTIER CALIFORNIA INC. | 2319 | MORENO | CA | |
| 951-657 | FRONTIER CALIFORNIA INC. | 2319 | PERRIS | CA | |
| 951-658 | FRONTIER CALIFORNIA INC. | 2319 | HEMT HEMT | CA | |
| 951-659 | FRONTIER CALIFORNIA INC. | 2319 | IDYLLWILD | 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.