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
Aug 2026
Jul 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 972-244 | TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 7148 | PLANO | TX | |
| 972-245 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | CARROLLTON | TX | |
| 972-246 | AT&T - LOCAL | 7421 | DALLAS | TX | |
| 972-247 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-248 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-249 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GRANDPRARI | TX | |
| 972-250 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-251 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | IRVING | TX | |
| 972-252 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | IRVING | TX | |
| 972-253 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | IRVING | TX | |
| 972-254 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | IRVING | TX | |
| 972-255 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | IRVING | TX | |
| 972-256 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | IRVING | TX | |
| 972-257 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | IRVING | TX | |
| 972-258 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | IRVING | TX | |
| 972-259 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | IRVING | TX | |
| 972-260 | SOUTHWESTERN BELL | 9533 | GRANDPRARI | TX | |
| 972-261 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | IRVING | TX | |
| 972-262 | SOUTHWESTERN BELL | 9533 | GRANDPRARI | TX | |
| 972-263 | SOUTHWESTERN BELL | 9533 | GRANDPRARI | TX | |
| 972-264 | SOUTHWESTERN BELL | 9533 | GRANDPRARI | TX | |
| 972-265 | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | PLANO | TX | |
| 972-266 | SOUTHWESTERN BELL | 9533 | GRANDPRARI | TX | |
| 972-267 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-268 | ONVOY, LLC - TX | 903C | WAXAHACHIE | TX | |
| 972-269 | SOUTHWESTERN BELL | 9533 | GRANDPRARI | TX | |
| 972-270 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-271 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | PLANO | TX | |
| 972-272 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | PLANO | TX | |
| 972-273 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | IRVING | TX | |
| 972-274 | SOUTHWESTERN BELL | 9533 | DE SOTO | TX | |
| 972-275 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-276 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | PLANO | TX | |
| 972-277 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-278 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | PLANO | TX | |
| 972-279 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-280 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-281 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | IRVING | TX | |
| 972-282 | SOUTHWESTERN BELL | 9533 | GRANDPRARI | TX | |
| 972-283 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-284 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-285 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-286 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-287 | SOUTHWESTERN BELL | 9533 | SEAGOVILLE | TX | |
| 972-288 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-289 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-290 | SOUTHWESTERN BELL | 9533 | DALLAS | TX | |
| 972-291 | SOUTHWESTERN BELL | 9533 | CEDAR HILL | TX | |
| 972-292 | SOUTHWESTERN BELL | 9533 | FRISCO | TX | |
| 972-293 | SOUTHWESTERN BELL | 9533 | CEDAR HILL | 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.