NumberResearchRecent prefix assignments
352 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
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 956-350 | SOUTHWESTERN BELL | 9533 | BROWNSVL | TX | |
| 956-357 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | HARLINGEN | TX | |
| 956-358 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | MCALLEN | TX | |
| 956-361 | SOUTHWESTERN BELL | 9533 | SAN BENITO | TX | |
| 956-364 | SOUTHWESTERN BELL | 9533 | HARLINGEN | TX | |
| 956-365 | SOUTHWESTERN BELL | 9533 | HARLINGEN | TX | |
| 956-366 | SOUTHWESTERN BELL | 9533 | HARLINGEN | TX | |
| 956-367 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HARLINGEN | TX | |
| 956-368 | ONVOY, LLC - TX | 903C | HARLINGEN | TX | |
| 956-369 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | EDINBURG | TX | |
| 956-371 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BROWNSVL | TX | |
| 956-373 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | WESLACO | TX | |
| 956-376 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | WESLACO | TX | |
| 956-377 | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | DONNA | TX | |
| 956-380 | SOUTHWESTERN BELL | 9533 | EDINBURG | TX | |
| 956-381 | SOUTHWESTERN BELL | 9533 | EDINBURG | TX | |
| 956-383 | SOUTHWESTERN BELL | 9533 | EDINBURG | TX | |
| 956-384 | SOUTHWESTERN BELL | 9533 | EDINBURG | TX | |
| 956-385 | SOUTHWESTERN BELL | 9533 | EDINBURG | TX | |
| 956-386 | SOUTHWESTERN BELL | 9533 | EDINBURG | TX | |
| 956-387 | SOUTHWESTERN BELL | 9533 | EDINBURG | TX | |
| 956-388 | SOUTHWESTERN BELL | 9533 | EDINBURG | TX | |
| 956-389 | SOUTHWESTERN BELL | 9533 | HARLINGEN | TX | |
| 956-390 | SOUTHWESTERN BELL | 9533 | HARLINGEN | TX | |
| 956-392 | SOUTHWESTERN BELL | 9533 | HARLINGEN | TX | |
| 956-393 | SOUTHWESTERN BELL | 9533 | EDINBURG | TX | |
| 956-395 | AT&T ENTERPRISES, LLC | 516C | RIO HONDO | TX | |
| 956-399 | SOUTHWESTERN BELL | 9533 | SAN BENITO | TX | |
| 956-411 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | TX | |
| 956-412 | SOUTHWESTERN BELL | 9533 | HARLINGEN | TX | |
| 956-417 | ALENCO COMMUNICATIONS, INC. | 2090 | DOLORES | TX | |
| 956-418 | ALENCO COMMUNICATIONS, INC. | 2090 | DOLORES | TX | |
| 956-419 | ALENCO COMMUNICATIONS, INC. | 2090 | DOLORES | TX | |
| 956-421 | SOUTHWESTERN BELL | 9533 | HARLINGEN | TX | |
| 956-423 | SOUTHWESTERN BELL | 9533 | HARLINGEN | TX | |
| 956-424 | SOUTHWESTERN BELL | 9533 | MISSION | TX | |
| 956-425 | SOUTHWESTERN BELL | 9533 | HARLINGEN | TX | |
| 956-427 | SOUTHWESTERN BELL | 9533 | HARLINGEN | TX | |
| 956-428 | SOUTHWESTERN BELL | 9533 | HARLINGEN | TX | |
| 956-429 | SOUTHWESTERN BELL | 9533 | MCALLEN | TX | |
| 956-430 | SOUTHWESTERN BELL | 9533 | HARLINGEN | TX | |
| 956-440 | SOUTHWESTERN BELL | 9533 | HARLINGEN | TX | |
| 956-444 | SOUTHWESTERN BELL | 9533 | HARLINGEN | TX | |
| 956-447 | FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | WESLACO | TX | |
| 956-451 | STPCS JOINT VENTURE, LLC | 4290 | MCALLEN | TX | |
| 956-452 | VONAGE AMERICA LLC | 197D | LAREDO | TX | |
| 956-453 | STPCS JOINT VENTURE, LLC | 4290 | HARLINGEN | TX | |
| 956-454 | METROPCS, INC. | 5562 | HARLINGEN | TX | |
| 956-461 | SOUTHWESTERN BELL | 9533 | DONNA | TX | |
| 956-464 | SOUTHWESTERN BELL | 9533 | DONNA | 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.