T-MOBILE USA, INC.
25 prefixes in 779 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 779-233 | JOLIET | 6529 | 2011-07-21 | Yes |
| 779-236 | KANKAKEE | 6529 | 2011-07-27 | Yes |
| 779-238 | ROCKFORD | 6529 | 2017-04-04 | Yes |
| 779-240 | KANKAKEE | 6529 | 2014-06-11 | Yes |
| 779-241 | MORRIS | 6529 | 2017-06-01 | Yes |
| 779-245 | STERLING | 6529 | 2008-07-14 | Yes |
| 779-250 | STERLING | 6529 | 2018-02-27 | Yes |
| 779-300 | ROCKFORD | 6529 | 2011-02-17 | Yes |
| 779-301 | KANKAKEE | 6529 | 2014-06-11 | Yes |
| 779-329 | MENDOTA | 6529 | 2021-06-10 | Yes |
| 779-349 | SPRING VLY | 6529 | 2022-01-11 | Yes |
| 779-372 | DIXON | 6529 | 2023-07-20 | Yes |
| 779-384 | HARVARD | 6529 | 2024-01-09 | Yes |
| 779-386 | PRINCETON | 6529 | 2024-02-08 | Yes |
| 779-390 | LOCKPORT | 6529 | 2024-03-27 | Yes |
| 779-403 | MCHENRY | 6529 | 2024-06-25 | Yes |
| 779-431 | DE KALB | 6529 | 2025-08-19 | Yes |
| 779-436 | PLAINFIELD | 6529 | 2025-11-25 | Yes |
| 779-456 | JOLIET | 6529 | 2008-01-09 | Yes |
| 779-702 | JOLIET | 6529 | 2014-06-11 | Yes |
| 779-703 | JOLIET | 6529 | 2013-10-07 | Yes |
| 779-713 | WOODSTOCK | 6529 | 2015-05-22 | Yes |
| 779-780 | LOCKPORT | 6529 | 2026-04-28 | Yes |
| 779-875 | JOLIET | 6529 | 2007-07-12 | Yes |
| 779-915 | WOODSTOCK | 6529 | 2016-11-16 | 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.