T-MOBILE USA, INC.
28 prefixes in 608 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 608-207 | BELOIT | 6529 | — | Yes |
| 608-209 | MADISON | 6529 | — | Yes |
| 608-213 | MADISON | 6529 | — | Yes |
| 608-217 | MADISON | 6529 | — | Yes |
| 608-239 | MADISON | 6529 | — | Yes |
| 608-351 | WEST SALEM | 6529 | 2008-01-29 | Yes |
| 608-359 | JANESVILLE | 6529 | — | Yes |
| 608-385 | LA CROSSE | 6529 | — | Yes |
| 608-448 | BARABOO | 6529 | 2001-08-03 | Yes |
| 608-515 | MADISON | 6529 | 2009-10-28 | Yes |
| 608-566 | PORTAGE | 6529 | 2001-11-02 | Yes |
| 608-567 | TOMAH | 6529 | 2001-11-02 | Yes |
| 608-658 | MADISON | 6529 | 2001-02-05 | Yes |
| 608-704 | WEST SALEM | 6529 | 2021-04-24 | Yes |
| 608-706 | TOMAH | 6529 | 2021-06-28 | Yes |
| 608-707 | MADISON | 6529 | — | Yes |
| 608-724 | LA CROSSE | 6529 | 2001-04-01 | Yes |
| 608-814 | BELOIT | 6529 | 2022-12-08 | Yes |
| 608-815 | JANESVILLE | 6529 | 2022-12-08 | Yes |
| 608-901 | JANESVILLE | 6529 | 2018-10-31 | Yes |
| 608-917 | WISCONDLLS | 6529 | 2024-02-21 | Yes |
| 608-951 | GALESVILLE | 6529 | 2025-01-21 | Yes |
| 608-952 | HOLMEN | 6529 | 2025-01-21 | Yes |
| 608-953 | LANCASTER | 6529 | 2025-01-22 | Yes |
| 608-954 | MUSCODA | 6529 | 2025-01-22 | Yes |
| 608-956 | RICHLD CTR | 6529 | 2025-01-23 | Yes |
| 608-971 | ELROY | 6529 | 2025-03-18 | Yes |
| 608-980 | REEDSBURG | 6529 | 2025-05-23 | Yes |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.