NumberResearchRecent prefix assignments
16 prefixes assigned in December 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, December 2025
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| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 2025-12-17 | 747-384 | T-MOBILE USA, INC. | 6529 | BRBN BRBN | CA |
| 2025-12-17 | 951-810 | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2025-12-12 | 945-421 | T-MOBILE USA, INC. | 6529 | DALLAS | TX |
| 2025-12-10 | 385-620 | T-MOBILE USA, INC. | 6529 | MURRAY | UT |
| 2025-12-10 | 458-337 | T-MOBILE USA, INC. | 6529 | ALBANY | OR |
| 2025-12-10 | 458-338 | T-MOBILE USA, INC. | 6529 | BEND | OR |
| 2025-12-10 | 738-202 | T-MOBILE USA, INC. | 6529 | LSAN DA 04 | CA |
| 2025-12-05 | 501-591 | T-MOBILE USA, INC. | 6529 | BEEBE | AR |
| 2025-12-05 | 515-403 | T-MOBILE USA, INC. | 6529 | AMES | IA |
| 2025-12-03 | 307-435 | T-MOBILE USA, INC. | 6529 | SHERIDAN | WY |
| 2025-12-03 | 435-369 | T-MOBILE USA, INC. | 6529 | BRIGHAM CY | UT |
| 2025-12-03 | 458-359 | T-MOBILE USA, INC. | 6529 | MILTONFWTR | OR |
| 2025-12-03 | 562-701 | T-MOBILE USA, INC. | 6529 | ALAMITOS | CA |
| 2025-12-03 | 808-279 | T-MOBILE USA, INC. | 6529 | HILO | HI |
| 2025-12-03 | 970-917 | T-MOBILE USA, INC. | 6529 | DURANGO | CO |
| 2025-12-03 | 986-302 | T-MOBILE USA, INC. | 6529 | TWIN FALLS | ID |
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.