NumberResearchRecent prefix assignments
371 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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 |
|---|---|---|---|---|---|
| 925-459 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CONCORD | CA | |
| 925-460 | PACIFIC BELL | 9740 | PLEASANTON | CA | |
| 925-461 | PACIFIC BELL | 9740 | PLEASANTON | CA | |
| 925-462 | PACIFIC BELL | 9740 | PLEASANTON | CA | |
| 925-463 | PACIFIC BELL | 9740 | PLEASANTON | CA | |
| 925-465 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | WALNUT CRK | CA | |
| 925-467 | PACIFIC BELL | 9740 | PLEASANTON | CA | |
| 925-468 | PACIFIC BELL | 9740 | PLEASANTON | CA | |
| 925-469 | PACIFIC BELL | 9740 | PLEASANTON | CA | |
| 925-470 | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | ANTIOCH | CA | |
| 925-471 | ONVOY, LLC - CA | 649C | CONCORD | CA | |
| 925-472 | PACIFIC BELL | 9740 | WALNUT CRK | CA | |
| 925-473 | PACIFIC BELL | 9740 | PITTSBURG | CA | |
| 925-474 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | PLEASANTON | CA | |
| 925-475 | MATRIX TELECOM, LLC. S/I/I TNCI - CA | 7379 | PLEASANTON | CA | |
| 925-476 | MATRIX TELECOM, LLC. S/I/I TNCI - CA | 7379 | WALNUT CRK | CA | |
| 925-478 | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | WALNUT CRK | CA | |
| 925-479 | PACIFIC BELL | 9740 | DUBLN-SNRM | CA | |
| 925-480 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | BSHP RNCH | CA | |
| 925-482 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | WALNUT CRK | CA | |
| 925-484 | PACIFIC BELL | 9740 | PLEASANTON | CA | |
| 925-485 | PACIFIC BELL | 9740 | PLEASANTON | CA | |
| 925-487 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DUBLN-SNRM | CA | |
| 925-493 | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | LIVERMORE | CA | |
| 925-498 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | BSHP RNCH | CA | |
| 925-500 | ONVOY, LLC - CA | 649C | MARTINEZ | CA | |
| 925-509 | SPOK, INC. | 6630 | BSHP RNCH | CA | |
| 925-511 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | CA | |
| 925-513 | PACIFIC BELL | 9740 | ECONTRCOST | CA | |
| 925-516 | PACIFIC BELL | 9740 | ECONTRCOST | CA | |
| 925-517 | ONVOY, LLC - CA | 649C | PSBG WEST | CA | |
| 925-518 | METROPCS, INC. | 5562 | LIVERMORE | CA | |
| 925-519 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | PLEASANTON | CA | |
| 925-520 | PACIFIC BELL | 9740 | PLEASANTON | CA | |
| 925-521 | PACIFIC BELL | 9740 | CONCORD | CA | |
| 925-522 | PACIFIC BELL | 9740 | ANTIOCH | CA | |
| 925-523 | PACIFIC BELL | 9740 | PLEASANTON | CA | |
| 925-524 | PACIFIC BELL | 9740 | CLAYTON | CA | |
| 925-525 | METROPCS, INC. | 5562 | LIVERMORE | CA | |
| 925-526 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | PITTSBURG | CA | |
| 925-527 | UTILITY TELECOM GROUP, LLC - CA | 9262 | WALNUT CRK | CA | |
| 925-528 | T-MOBILE USA, INC. | 6529 | ORINDA | CA | |
| 925-529 | ONVOY, LLC - CA | 649C | ANTIOCH | CA | |
| 925-535 | METROPCS, INC. | 5562 | PLEASANTON | CA | |
| 925-543 | PACIFIC BELL | 9740 | BSHP RNCH | CA | |
| 925-548 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DUBLN-SNRM | CA | |
| 925-549 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DUBLN-SNRM | CA | |
| 925-550 | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ANTIOCH | CA | |
| 925-551 | PACIFIC BELL | 9740 | DUBLN-SNRM | CA | |
| 925-552 | PACIFIC BELL | 9740 | DANVILLE | CA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.