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
Aug 2026
Jul 2026
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Dec 2025
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Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 214-492 | SOUTHWESTERN BELL TELEPHONE COMPANY - TX | 7726 | IRVING | TX | |
| 214-493 | SOUTHWESTERN BELL TELEPHONE COMPANY - TX | 7726 | IRVING | TX | |
| 214-495 | SOUTHWESTERN BELL | 9533 | ALLEN | TX | |
| 214-496 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-497 | METROPCS, INC. | 5562 | GRANDPRARI | TX | |
| 214-498 | T-MOBILE USA, INC. | 6529 | GRANDPRARI | TX | |
| 214-499 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | IRVING | TX | |
| 214-500 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | IRVING | TX | |
| 214-502 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 214-503 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-504 | SOUTHWESTERN BELL | 9533 | MCKINNEY | TX | |
| 214-505 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 214-506 | CSC VOICE, LLC | 612K | SEAGOVILLE | TX | |
| 214-507 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 214-508 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-510 | SPOK, INC. | 6630 | GRANDPRARI | TX | |
| 214-511 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | TX | |
| 214-512 | SPOK, INC. | 6630 | GRANDPRARI | TX | |
| 214-513 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | LEWISVILLE | TX | |
| 214-515 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-516 | T-MOBILE USA, INC. | 6529 | GRANDPRARI | TX | |
| 214-518 | T-MOBILE USA, INC. | 6529 | GRANDPRARI | TX | |
| 214-519 | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | 7670 | IRVING | TX | |
| 214-520 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-521 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-522 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-523 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-524 | SOUTHWESTERN BELL TELEPHONE COMPANY - TX | 7726 | IRVING | TX | |
| 214-525 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-526 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-527 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-528 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-529 | METROPCS, INC. | 5562 | IRVING | TX | |
| 214-530 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DALLAS | TX | |
| 214-532 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 214-533 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 214-534 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 214-535 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 214-536 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 214-537 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 214-538 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 214-539 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 214-540 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DALLAS | TX | |
| 214-541 | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | 7670 | IRVING | TX | |
| 214-542 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | GRANDPRARI | TX | |
| 214-543 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 214-544 | SOUTHWESTERN BELL | 9533 | MCKINNEY | TX | |
| 214-545 | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX | |
| 214-546 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 214-547 | SOUTHWESTERN BELL | 9533 | ALLEN | 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.