NumberResearchRecent prefix assignments
380 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
Sep 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 972-455 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-456 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | DLFTWTARPT | TX | |
| 972-457 | ONVOY, LLC - TX | 903C | IRVING | TX | |
| 972-458 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-459 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | LEWISVILLE | TX | |
| 972-460 | ONVOY, LLC - TX | 903C | CEDAR HILL | TX | |
| 972-461 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | PLANO | TX | |
| 972-462 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | LEWISVILLE | TX | |
| 972-463 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | PLANO | TX | |
| 972-464 | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | FRISCO | TX | |
| 972-465 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | IRVING | TX | |
| 972-466 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | CARROLLTON | TX | |
| 972-467 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 972-468 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | PLANO | TX | |
| 972-470 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-471 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | LEWISVILLE | TX | |
| 972-472 | SOUTHWESTERN BELL | 9533 | CRANDALL | TX | |
| 972-473 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | PLANO | TX | |
| 972-474 | SOUTHWESTERN BELL | 9533 | COMBINE | TX | |
| 972-475 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | PLANO | TX | |
| 972-476 | SOUTHWESTERN BELL | 9533 | COMBINE | TX | |
| 972-477 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PLANO | TX | |
| 972-478 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | CARROLLTON | TX | |
| 972-479 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-480 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-481 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-483 | SOUTHWESTERN BELL | 9533 | ITALY | TX | |
| 972-484 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-485 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | PLANO | TX | |
| 972-486 | TEXAS WINDSTREAM, LLC | 2153 | SCURRY | TX | |
| 972-487 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | PLANO | TX | |
| 972-488 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-489 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX | |
| 972-490 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-491 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | PLANO | TX | |
| 972-492 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | CARROLLTON | TX | |
| 972-493 | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | MILFORD | TX | |
| 972-494 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | PLANO | TX | |
| 972-495 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | PLANO | TX | |
| 972-496 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | PLANO | TX | |
| 972-497 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-498 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-499 | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | DALLAS | TX | |
| 972-500 | SPOK, INC. | 6630 | IRVING | TX | |
| 972-501 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-502 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DALLAS | TX | |
| 972-503 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-504 | SOUTHWESTERN BELL | 9533 | GRANDPRARI | TX | |
| 972-505 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | IRVING | TX | |
| 972-506 | SOUTHWESTERN BELL | 9533 | DALLAS | TX |
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.