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
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Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 210-271 | SOUTHWESTERN BELL | 9533 | SANANTONIO | TX | |
| 210-272 | SOUTHWESTERN BELL | 9533 | SANANTONIO | TX | |
| 210-273 | T-MOBILE USA, INC. | 6529 | SANANTONIO | TX | |
| 210-274 | METROPCS, INC. | 5562 | SANANTONIO | TX | |
| 210-275 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SANANTONIO | TX | |
| 210-276 | SOUTHWESTERN BELL | 9533 | SANANTONIO | TX | |
| 210-277 | SOUTHWESTERN BELL | 9533 | SANANTONIO | TX | |
| 210-279 | T-MOBILE USA, INC. | 6529 | SANANTONIO | TX | |
| 210-280 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SANANTONIO | TX | |
| 210-281 | SOUTHWESTERN BELL | 9533 | SANANTONIO | TX | |
| 210-282 | SOUTHWESTERN BELL | 9533 | SANANTONIO | TX | |
| 210-283 | SOUTHWESTERN BELL | 9533 | SANANTONIO | TX | |
| 210-285 | SPOK, INC. | 6630 | SANANTONIO | TX | |
| 210-286 | T-MOBILE USA, INC. | 6529 | SANANTONIO | TX | |
| 210-287 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SANANTONIO | TX | |
| 210-288 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SANANTONIO | TX | |
| 210-289 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SANANTONIO | TX | |
| 210-290 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SANANTONIO | TX | |
| 210-292 | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 8434 | SANANTONIO | TX | |
| 210-293 | ONVOY, LLC - TX | 903C | SANANTONIO | TX | |
| 210-296 | SOUTHWESTERN BELL | 9533 | SANANTONIO | TX | |
| 210-297 | SOUTHWESTERN BELL | 9533 | SANANTONIO | TX | |
| 210-298 | ONVOY, LLC - TX | 903C | SANANTONIO | TX | |
| 210-299 | SOUTHWESTERN BELL | 9533 | SANANTONIO | TX | |
| 210-301 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SANANTONIO | TX | |
| 210-302 | SOUTHWESTERN BELL | 9533 | SANANTONIO | TX | |
| 210-304 | SOUTHWESTERN BELL | 9533 | SANANTONIO | TX | |
| 210-308 | SOUTHWESTERN BELL | 9533 | SANANTONIO | TX | |
| 210-310 | SOUTHWESTERN BELL | 9533 | SANANTONIO | TX | |
| 210-311 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | TX | |
| 210-313 | METROPCS, INC. | 5562 | SANANTONIO | TX | |
| 210-315 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SANANTONIO | TX | |
| 210-316 | T-MOBILE USA, INC. | 6529 | SANANTONIO | TX | |
| 210-317 | T-MOBILE USA, INC. | 6529 | SANANTONIO | TX | |
| 210-318 | METROPCS, INC. | 5562 | SANANTONIO | TX | |
| 210-320 | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | 7670 | SANANTONIO | TX | |
| 210-321 | SOUTHWESTERN BELL | 9533 | SANANTONIO | TX | |
| 210-323 | SOUTHWESTERN BELL | 9533 | SANANTONIO | TX | |
| 210-325 | T-MOBILE USA, INC. | 6529 | SANANTONIO | TX | |
| 210-326 | T-MOBILE USA, INC. | 6529 | SANANTONIO | TX | |
| 210-329 | ONVOY SPECTRUM, LLC | 624H | SANANTONIO | TX | |
| 210-331 | AT&T - LOCAL | 7421 | SANANTONIO | TX | |
| 210-332 | AT&T - LOCAL | 7421 | SANANTONIO | TX | |
| 210-333 | SOUTHWESTERN BELL | 9533 | SANANTONIO | TX | |
| 210-334 | SOUTHWESTERN BELL | 9533 | SANANTONIO | TX | |
| 210-335 | SOUTHWESTERN BELL | 9533 | SANANTONIO | TX | |
| 210-337 | SOUTHWESTERN BELL | 9533 | SANANTONIO | TX | |
| 210-339 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SANANTONIO | TX | |
| 210-340 | SOUTHWESTERN BELL | 9533 | SANANTONIO | TX | |
| 210-341 | SOUTHWESTERN BELL | 9533 | SANANTONIO | 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.