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 |
|---|---|---|---|---|---|
| 636-299 | T-MOBILE USA, INC. | 6529 | CHESTERFLD | MO | |
| 636-318 | T-MOBILE USA, INC. | 6529 | TROY | MO | |
| 636-346 | T-MOBILE USA, INC. | 6529 | CHESTERFLD | MO | |
| 636-373 | T-MOBILE USA, INC. | 6529 | ST CHARLES | MO | |
| 636-497 | T-MOBILE USA, INC. | 6529 | WENTZVILLE | MO | |
| 636-538 | T-MOBILE USA, INC. | 6529 | WENTZVILLE | MO | |
| 636-679 | T-MOBILE USA, INC. | 6529 | WENTZVILLE | MO | |
| 636-734 | T-MOBILE USA, INC. | 6529 | ST CHARLES | MO | |
| 636-841 | T-MOBILE USA, INC. | 6529 | WENTZVILLE | MO | |
| 641-318 | T-MOBILE USA, INC. | 6529 | KNOXVILLE | IA | |
| 641-416 | T-MOBILE USA, INC. | 6529 | PELLA | IA | |
| 641-417 | T-MOBILE USA, INC. | 6529 | NEWTON | IA | |
| 641-504 | T-MOBILE USA, INC. | 6529 | OSKALOOSA | IA | |
| 641-510 | T-MOBILE USA, INC. | 6529 | GRINNELL | IA | |
| 641-781 | T-MOBILE USA, INC. | 6529 | NEWTON | IA | |
| 641-831 | T-MOBILE USA, INC. | 6529 | NEWTON | IA | |
| 641-861 | T-MOBILE USA, INC. | 6529 | PELLA | IA | |
| 650-201 | T-MOBILE USA, INC. | 6529 | SSNFRNCSCO | CA | |
| 650-218 | T-MOBILE USA, INC. | 6529 | SAN MATEO | CA | |
| 650-219 | T-MOBILE USA, INC. | 6529 | SSNFRNCSCO | CA | |
| 650-222 | T-MOBILE USA, INC. | 6529 | SAN MATEO | CA | |
| 650-248 | T-MOBILE USA, INC. | 6529 | PALO ALTO | CA | |
| 650-270 | T-MOBILE USA, INC. | 6529 | SSNFRNCSCO | CA | |
| 650-274 | T-MOBILE USA, INC. | 6529 | SAN MATEO | CA | |
| 650-281 | T-MOBILE USA, INC. | 6529 | SAN MATEO | CA | |
| 650-284 | T-MOBILE USA, INC. | 6529 | HALFMOONBY | CA | |
| 650-315 | T-MOBILE USA, INC. | 6529 | SAN MATEO | CA | |
| 650-333 | T-MOBILE USA, INC. | 6529 | SSNFRNCSCO | CA | |
| 650-346 | T-MOBILE USA, INC. | 6529 | SAN MATEO | CA | |
| 650-396 | T-MOBILE USA, INC. | 6529 | MT VIEW | CA | |
| 650-444 | T-MOBILE USA, INC. | 6529 | PALO ALTO | CA | |
| 650-451 | T-MOBILE USA, INC. | 6529 | PACIFICA | CA | |
| 650-520 | T-MOBILE USA, INC. | 6529 | SAN MATEO | CA | |
| 650-537 | T-MOBILE USA, INC. | 6529 | MT VIEW | CA | |
| 650-539 | T-MOBILE USA, INC. | 6529 | SAN MATEO | CA | |
| 650-544 | T-MOBILE USA, INC. | 6529 | SAN MATEO | CA | |
| 650-642 | T-MOBILE USA, INC. | 6529 | SAN MATEO | CA | |
| 650-646 | T-MOBILE USA, INC. | 6529 | PALO ALTO | CA | |
| 650-784 | T-MOBILE USA, INC. | 6529 | SSNFRNCSCO | CA | |
| 650-826 | T-MOBILE USA, INC. | 6529 | SSNFRNCSCO | CA | |
| 650-954 | T-MOBILE USA, INC. | 6529 | SAN MATEO | CA | |
| 657-347 | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA | |
| 657-357 | T-MOBILE USA, INC. | 6529 | SANTA ANA | CA | |
| 657-456 | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA | |
| 661-201 | T-MOBILE USA, INC. | 6529 | BKFD MAIN | CA | |
| 661-232 | T-MOBILE USA, INC. | 6529 | MOJAVE | CA | |
| 661-234 | T-MOBILE USA, INC. | 6529 | PLDL PLDL | CA | |
| 661-247 | T-MOBILE USA, INC. | 6529 | ARVIN | CA | |
| 661-444 | T-MOBILE USA, INC. | 6529 | BKFD MAIN | CA | |
| 661-547 | T-MOBILE USA, INC. | 6529 | LANCASTER | CA |
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.