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
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Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 972-349 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-350 | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | LEWISVILLE | TX | |
| 972-352 | SOUTHWESTERN BELL | 9533 | GRANDPRARI | TX | |
| 972-353 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | LEWISVILLE | TX | |
| 972-354 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | DALLAS | TX | |
| 972-355 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | LEWISVILLE | TX | |
| 972-356 | SPOK, INC. | 6630 | GRANDPRARI | TX | |
| 972-357 | ONVOY, LLC - TX | 903C | FORNEY | TX | |
| 972-359 | SOUTHWESTERN BELL | 9533 | ALLEN | TX | |
| 972-360 | TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 7148 | CARROLLTON | TX | |
| 972-361 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-362 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-363 | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | 7670 | MCKINNEY | TX | |
| 972-364 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-365 | T-MOBILE USA, INC. | 6529 | GRANDPRARI | TX | |
| 972-366 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 2154 | VENUS | TX | |
| 972-367 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DALLAS | TX | |
| 972-368 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-369 | SOUTHWESTERN BELL | 9533 | MCKINNEY | TX | |
| 972-370 | SOUTHWESTERN BELL | 9533 | FRISCO | TX | |
| 972-371 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-372 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PLANO | TX | |
| 972-373 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-374 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | IRVING | TX | |
| 972-375 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GRANDPRARI | TX | |
| 972-376 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-377 | SOUTHWESTERN BELL | 9533 | FRISCO | TX | |
| 972-378 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | PLANO | TX | |
| 972-379 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | PLANO | TX | |
| 972-380 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-381 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-382 | SOUTHWESTERN BELL | 9533 | CELINA | TX | |
| 972-383 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-384 | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | 7670 | PLANO | TX | |
| 972-385 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-386 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-387 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-388 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-389 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | CARROLLTON | TX | |
| 972-390 | SOUTHWESTERN BELL | 9533 | ALLEN | TX | |
| 972-391 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-392 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-393 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | LEWISVILLE | TX | |
| 972-394 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | CARROLLTON | TX | |
| 972-395 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | CARROLLTON | TX | |
| 972-396 | SOUTHWESTERN BELL | 9533 | ALLEN | TX | |
| 972-397 | SPOK, INC. | 6630 | GRANDPRARI | TX | |
| 972-398 | SOUTHWESTERN BELL TELEPHONE COMPANY - TX | 7726 | PLANO | TX | |
| 972-399 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | IRVING | TX | |
| 972-401 | 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.