NumberResearchRecent prefix assignments
15 prefixes assigned in November 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, November 2025
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| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 2025-11-28 | 341-265 | T-MOBILE USA, INC. | 6529 | ELSBR-PINL | CA |
| 2025-11-28 | 858-445 | T-MOBILE USA, INC. | 6529 | SNDG MRMS | CA |
| 2025-11-26 | 385-618 | T-MOBILE USA, INC. | 6529 | PROVO | UT |
| 2025-11-25 | 779-436 | T-MOBILE USA, INC. | 6529 | PLAINFIELD | IL |
| 2025-11-24 | 840-286 | T-MOBILE USA, INC. | 6529 | ARROWHEAD | CA |
| 2025-11-17 | 224-672 | T-MOBILE USA, INC. | 6529 | ARLIGTNHTS | IL |
| 2025-11-17 | 986-301 | T-MOBILE USA, INC. | 6529 | BOISE | ID |
| 2025-11-13 | 657-835 | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2025-11-07 | 253-436 | T-MOBILE USA, INC. | 6529 | AUBURN | WA |
| 2025-11-06 | 307-385 | T-MOBILE USA, INC. | 6529 | JACKSON | WY |
| 2025-11-06 | 458-357 | T-MOBILE USA, INC. | 6529 | MADRAS | OR |
| 2025-11-06 | 628-329 | T-MOBILE USA, INC. | 6529 | SAUSALITO | CA |
| 2025-11-06 | 820-246 | T-MOBILE USA, INC. | 6529 | ATASCADERO | CA |
| 2025-11-06 | 928-553 | T-MOBILE USA, INC. | 6529 | BULLHEADCY | AZ |
| 2025-11-05 | 224-671 | T-MOBILE USA, INC. | 6529 | ARLIGTNHTS | IL |
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.