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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| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 918-851 | T-MOBILE USA, INC. | 6529 | TULSA | OK | |
| 918-852 | T-MOBILE USA, INC. | 6529 | TULSA | OK | |
| 918-853 | T-MOBILE USA, INC. | 6529 | TULSA | OK | |
| 920-203 | T-MOBILE USA, INC. | 6529 | OSHKOSH | WI | |
| 920-205 | T-MOBILE USA, INC. | 6529 | APPLETON | WI | |
| 920-217 | T-MOBILE USA, INC. | 6529 | GREEN BAY | WI | |
| 920-222 | T-MOBILE USA, INC. | 6529 | LAKE MILLS | WI | |
| 920-251 | T-MOBILE USA, INC. | 6529 | FONDDU LAC | WI | |
| 920-297 | T-MOBILE USA, INC. | 6529 | LAKE MILLS | WI | |
| 920-318 | T-MOBILE USA, INC. | 6529 | BEAVER DAM | WI | |
| 920-371 | T-MOBILE USA, INC. | 6529 | GREEN BAY | WI | |
| 920-374 | T-MOBILE USA, INC. | 6529 | MANITOWOC | WI | |
| 920-375 | T-MOBILE USA, INC. | 6529 | FONDDU LAC | WI | |
| 920-571 | T-MOBILE USA, INC. | 6529 | MANITOWOC | WI | |
| 920-605 | T-MOBILE USA, INC. | 6529 | JEFFERSON | WI | |
| 920-681 | T-MOBILE USA, INC. | 6529 | MANITOWOC | WI | |
| 920-747 | T-MOBILE USA, INC. | 6529 | JEFFERSON | WI | |
| 920-786 | T-MOBILE USA, INC. | 6529 | HORICON | WI | |
| 920-791 | T-MOBILE USA, INC. | 6529 | BEAVER DAM | WI | |
| 920-941 | T-MOBILE USA, INC. | 6529 | WATERTOWN | WI | |
| 925-202 | T-MOBILE USA, INC. | 6529 | PLEASANTON | CA | |
| 925-209 | T-MOBILE USA, INC. | 6529 | PLEASANTON | CA | |
| 925-300 | T-MOBILE USA, INC. | 6529 | WALNUT CRK | CA | |
| 925-319 | T-MOBILE USA, INC. | 6529 | SUNOL | CA | |
| 925-351 | T-MOBILE USA, INC. | 6529 | PLEASANTON | CA | |
| 925-352 | T-MOBILE USA, INC. | 6529 | PLEASANTON | CA | |
| 925-366 | T-MOBILE USA, INC. | 6529 | PLEASANTON | CA | |
| 925-367 | T-MOBILE USA, INC. | 6529 | PLEASANTON | CA | |
| 925-368 | T-MOBILE USA, INC. | 6529 | PLEASANTON | CA | |
| 925-382 | T-MOBILE USA, INC. | 6529 | ANTIOCH | CA | |
| 925-435 | T-MOBILE USA, INC. | 6529 | CONCORD | CA | |
| 925-457 | T-MOBILE USA, INC. | 6529 | WALNUT CRK | CA | |
| 925-528 | T-MOBILE USA, INC. | 6529 | ORINDA | CA | |
| 925-570 | T-MOBILE USA, INC. | 6529 | DUBLN-SNRM | CA | |
| 925-580 | T-MOBILE USA, INC. | 6529 | PLEASANTON | CA | |
| 925-584 | T-MOBILE USA, INC. | 6529 | ANTIOCH | CA | |
| 925-623 | T-MOBILE USA, INC. | 6529 | PLEASANTON | CA | |
| 925-766 | T-MOBILE USA, INC. | 6529 | WALNUT CRK | CA | |
| 925-878 | T-MOBILE USA, INC. | 6529 | LAFAYETTE | CA | |
| 928-246 | T-MOBILE USA, INC. | 6529 | YUMA | AZ | |
| 928-261 | T-MOBILE USA, INC. | 6529 | YUMA | AZ | |
| 928-388 | T-MOBILE USA, INC. | 6529 | YUMA | AZ | |
| 928-459 | T-MOBILE USA, INC. | 6529 | YUMA | AZ | |
| 928-600 | T-MOBILE USA, INC. | 6529 | FLAGSTAFF | AZ | |
| 928-710 | T-MOBILE USA, INC. | 6529 | PRESCOTT | AZ | |
| 928-941 | T-MOBILE USA, INC. | 6529 | YUMA | AZ | |
| 937-219 | T-MOBILE USA, INC. | 6529 | DAYTON | OH | |
| 937-241 | T-MOBILE USA, INC. | 6529 | DAYTON | OH | |
| 937-251 | T-MOBILE USA, INC. | 6529 | DAYTON | OH | |
| 937-304 | T-MOBILE USA, INC. | 6529 | DAYTON | OH |
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.