NumberResearchRecent prefix assignments
20 prefixes assigned in October 2025 · 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, October 2025
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| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 2025-10-30 | 279-290 | T-MOBILE USA, INC. | 6529 | ELK GROVE | CA |
| 2025-10-30 | 442-494 | T-MOBILE USA, INC. | 6529 | BRAWLEY | CA |
| 2025-10-30 | 530-998 | T-MOBILE USA, INC. | 6529 | AUBN MAIN | CA |
| 2025-10-28 | 520-764 | T-MOBILE USA, INC. | 6529 | CASAGRANDE | AZ |
| 2025-10-24 | 738-200 | T-MOBILE USA, INC. | 6529 | LSAN DA 10 | CA |
| 2025-10-23 | 425-575 | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2025-10-21 | 858-443 | T-MOBILE USA, INC. | 6529 | CHULAVISTA | CA |
| 2025-10-17 | 442-493 | T-MOBILE USA, INC. | 6529 | VTVL HSPR | CA |
| 2025-10-17 | 539-388 | T-MOBILE USA, INC. | 6529 | BARTLESVL | OK |
| 2025-10-17 | 949-602 | T-MOBILE USA, INC. | 6529 | NEWPORTBCH | CA |
| 2025-10-15 | 945-409 | T-MOBILE USA, INC. | 6529 | DALLAS | TX |
| 2025-10-14 | 951-804 | T-MOBILE USA, INC. | 6529 | HEMT HEMT | CA |
| 2025-10-07 | 385-615 | T-MOBILE USA, INC. | 6529 | MURRAY | UT |
| 2025-10-07 | 945-408 | T-MOBILE USA, INC. | 6529 | DALLAS | TX |
| 2025-10-03 | 224-670 | T-MOBILE USA, INC. | 6529 | ARLIGTNHTS | IL |
| 2025-10-03 | 682-482 | T-MOBILE USA, INC. | 6529 | FORT WORTH | TX |
| 2025-10-02 | 747-383 | T-MOBILE USA, INC. | 6529 | BRBN BRBN | CA |
| 2025-10-02 | 951-803 | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2025-10-01 | 737-426 | T-MOBILE USA, INC. | 6529 | BASTROP | TX |
| 2025-10-01 | 808-991 | T-MOBILE USA, INC. | 6529 | HILO | HI |
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.