NumberResearchRecent prefix assignments
5 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/18/2026
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
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Oct 2025
| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 513-295 | T-MOBILE USA, INC. | 6529 | CINCINNATI | OH | |
| 513-307 | T-MOBILE USA, INC. | 6529 | CINCINNATI | OH | |
| 513-328 | T-MOBILE USA, INC. | 6529 | CINCINNATI | OH | |
| 513-348 | T-MOBILE USA, INC. | 6529 | CINCINNATI | OH | |
| 513-349 | T-MOBILE USA, INC. | 6529 | CINCINNATI | OH | |
| 513-383 | T-MOBILE USA, INC. | 6529 | CINCINNATI | OH | |
| 513-435 | T-MOBILE USA, INC. | 6529 | MIDDLETOWN | OH | |
| 513-461 | T-MOBILE USA, INC. | 6529 | OXFORD | OH | |
| 513-464 | T-MOBILE USA, INC. | 6529 | MIDDLETOWN | OH | |
| 513-544 | T-MOBILE USA, INC. | 6529 | CINCINNATI | OH | |
| 513-545 | T-MOBILE USA, INC. | 6529 | CINCINNATI | OH | |
| 513-546 | T-MOBILE USA, INC. | 6529 | CINCINNATI | OH | |
| 513-571 | T-MOBILE USA, INC. | 6529 | MIDDLETOWN | OH | |
| 513-602 | T-MOBILE USA, INC. | 6529 | CINCINNATI | OH | |
| 513-615 | T-MOBILE USA, INC. | 6529 | CINCINNATI | OH | |
| 513-616 | T-MOBILE USA, INC. | 6529 | CINCINNATI | OH | |
| 513-617 | T-MOBILE USA, INC. | 6529 | CINCINNATI | OH | |
| 513-623 | T-MOBILE USA, INC. | 6529 | CINCINNATI | OH | |
| 513-652 | T-MOBILE USA, INC. | 6529 | CINCINNATI | OH | |
| 513-804 | T-MOBILE USA, INC. | 6529 | MIDDLETOWN | OH | |
| 513-807 | T-MOBILE USA, INC. | 6529 | CINCINNATI | OH | |
| 513-836 | T-MOBILE USA, INC. | 6529 | LEBANON | OH | |
| 513-850 | T-MOBILE USA, INC. | 6529 | LEBANON | OH | |
| 513-884 | T-MOBILE USA, INC. | 6529 | CINCINNATI | OH | |
| 513-885 | T-MOBILE USA, INC. | 6529 | CINCINNATI | OH | |
| 513-886 | T-MOBILE USA, INC. | 6529 | CINCINNATI | OH | |
| 515-202 | T-MOBILE USA, INC. | 6529 | DES MOINES | IA | |
| 515-203 | T-MOBILE USA, INC. | 6529 | AMES | IA | |
| 515-372 | T-MOBILE USA, INC. | 6529 | BOONE | IA | |
| 515-419 | T-MOBILE USA, INC. | 6529 | DES MOINES | IA | |
| 515-441 | T-MOBILE USA, INC. | 6529 | AMES | IA | |
| 515-451 | T-MOBILE USA, INC. | 6529 | AMES | IA | |
| 515-554 | T-MOBILE USA, INC. | 6529 | DES MOINES | IA | |
| 515-556 | T-MOBILE USA, INC. | 6529 | DES MOINES | IA | |
| 515-770 | T-MOBILE USA, INC. | 6529 | DES MOINES | IA | |
| 515-771 | T-MOBILE USA, INC. | 6529 | DES MOINES | IA | |
| 515-778 | T-MOBILE USA, INC. | 6529 | DES MOINES | IA | |
| 515-779 | T-MOBILE USA, INC. | 6529 | DES MOINES | IA | |
| 515-865 | T-MOBILE USA, INC. | 6529 | DES MOINES | IA | |
| 515-867 | T-MOBILE USA, INC. | 6529 | DES MOINES | IA | |
| 515-988 | T-MOBILE USA, INC. | 6529 | DES MOINES | IA | |
| 515-991 | T-MOBILE USA, INC. | 6529 | DES MOINES | IA | |
| 520-238 | T-MOBILE USA, INC. | 6529 | YUMA | AZ | |
| 520-245 | T-MOBILE USA, INC. | 6529 | TUCSON | AZ | |
| 520-248 | T-MOBILE USA, INC. | 6529 | TUCSON | AZ | |
| 520-249 | T-MOBILE USA, INC. | 6529 | SIERRAVIST | AZ | |
| 520-250 | T-MOBILE USA, INC. | 6529 | TUCSON | AZ | |
| 520-251 | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ | |
| 520-252 | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ | |
| 520-270 | T-MOBILE USA, INC. | 6529 | TUCSON | AZ |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/18/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.