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 |
|---|---|---|---|---|---|
| 214-424 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-426 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-427 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | PLANO | TX | |
| 214-428 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-429 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-431 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-435 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 214-437 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | GRANDPRARI | TX | |
| 214-438 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DALLAS | TX | |
| 214-439 | SPOK, INC. | 6630 | GRANDPRARI | TX | |
| 214-440 | METROPCS, INC. | 5562 | PLANO | TX | |
| 214-441 | SOUTHWESTERN BELL TELEPHONE COMPANY - TX | 7726 | IRVING | TX | |
| 214-442 | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX | |
| 214-443 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-445 | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX | |
| 214-446 | MATRIX TELECOM, LLC. S/I/I TNCI - TX | 7715 | DALLAS | TX | |
| 214-447 | MATRIX TELECOM, LLC. S/I/I TNCI - TX | 7715 | DALLAS | TX | |
| 214-448 | T-MOBILE USA, INC. | 6529 | GRANDPRARI | TX | |
| 214-450 | T-MOBILE USA, INC. | 6529 | GRANDPRARI | TX | |
| 214-451 | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX | |
| 214-452 | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | DALLAS | TX | |
| 214-453 | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | DALLAS | TX | |
| 214-454 | T-MOBILE USA, INC. | 6529 | GRANDPRARI | TX | |
| 214-455 | T-MOBILE USA, INC. | 6529 | GRANDPRARI | TX | |
| 214-456 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-457 | T-MOBILE USA, INC. | 6529 | GRANDPRARI | TX | |
| 214-458 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 214-459 | TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 7148 | DALLAS | TX | |
| 214-460 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 214-461 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DALLAS | TX | |
| 214-462 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-464 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-465 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-466 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-467 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-468 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-472 | ONVOY, LLC - TX | 903C | FRISCO | TX | |
| 214-473 | SOUTHWESTERN BELL TELEPHONE COMPANY - TX | 7726 | PLANO | TX | |
| 214-474 | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | 7670 | PLANO | TX | |
| 214-475 | T-MOBILE USA, INC. | 6529 | GRANDPRARI | TX | |
| 214-476 | T-MOBILE USA, INC. | 6529 | GRANDPRARI | TX | |
| 214-477 | T-MOBILE USA, INC. | 6529 | GRANDPRARI | TX | |
| 214-478 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 214-480 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-483 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | CARROLLTON | TX | |
| 214-485 | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | 7670 | DALLAS | TX | |
| 214-486 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-488 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | LEWISVILLE | TX | |
| 214-489 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-491 | SOUTHWESTERN BELL | 9533 | MCKINNEY | TX |
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.