T-MOBILE USA, INC.
56 prefixes in 661 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 661-201 | BKFD MAIN | 6529 | — | Yes |
| 661-220 | ARVIN | 6529 | 2002-01-16 | Yes |
| 661-221 | MOJAVE | 6529 | 2002-01-16 | Yes |
| 661-232 | MOJAVE | 6529 | — | Yes |
| 661-234 | PLDL PLDL | 6529 | — | Yes |
| 661-247 | ARVIN | 6529 | — | Yes |
| 661-292 | SHAFTER | 6529 | 2002-01-16 | Yes |
| 661-293 | TAFT | 6529 | 2002-01-16 | Yes |
| 661-300 | TEHACHAPI | 6529 | 2002-01-16 | Yes |
| 661-314 | BKFD MAIN | 6529 | 2016-11-14 | Yes |
| 661-317 | PLDL PLDL | 6529 | 2001-12-14 | — |
| 661-365 | PLDL PLDL | 6529 | 2016-05-24 | Yes |
| 661-373 | SNCA NHCS | 6529 | 2001-12-14 | — |
| 661-403 | PLDL PLDL | 6529 | 2017-01-16 | Yes |
| 661-416 | ARVIN | 6529 | 2016-08-29 | Yes |
| 661-418 | LANCASTER | 6529 | 2012-02-24 | Yes |
| 661-421 | BKFD MAIN | 6529 | 2015-03-09 | Yes |
| 661-429 | LANCASTER | 6529 | 2012-09-24 | Yes |
| 661-444 | BKFD MAIN | 6529 | — | Yes |
| 661-445 | LANCASTER | 6529 | 2014-10-14 | Yes |
| 661-447 | BKFD MAIN | 6529 | 2013-12-09 | Yes |
| 661-472 | BKFD MAIN | 6529 | 2001-12-14 | — |
| 661-488 | LANCASTER | 6529 | 2014-12-22 | Yes |
| 661-492 | LANCASTER | 6529 | 2001-10-10 | Yes |
| 661-503 | PLDL PLDL | 6529 | 2020-07-28 | Yes |
| 661-519 | ARVIN | 6529 | 2021-06-30 | Yes |
| 661-531 | ARVIN | 6529 | 2021-10-28 | Yes |
| 661-545 | DELANO | 6529 | 2020-10-16 | Yes |
| 661-547 | LANCASTER | 6529 | — | Yes |
| 661-566 | PLDL PLDL | 6529 | 2019-03-19 | Yes |
| 661-569 | BKFD MAIN | 6529 | 2021-12-10 | Yes |
| 661-576 | PLDL PLDL | 6529 | 2015-08-03 | Yes |
| 661-593 | SNCA NHCS | 6529 | 2016-07-15 | Yes |
| 661-594 | SHAFTER | 6529 | 2022-09-02 | Yes |
| 661-606 | ARVIN | 6529 | — | Yes |
| 661-625 | SNCA NHCS | 6529 | 2021-12-08 | Yes |
| 661-627 | SNCA NHCS | 6529 | 2021-02-16 | Yes |
| 661-652 | SNCA NHCS | 6529 | 2024-09-12 | Yes |
| 661-653 | DELANO | 6529 | 2022-04-25 | Yes |
| 661-672 | ARVIN | 6529 | 2025-03-21 | Yes |
| 661-674 | LANCASTER | 6529 | — | Yes |
| 661-675 | PLDL PLDL | 6529 | — | Yes |
| 661-685 | ARVIN | 6529 | — | Yes |
| 661-690 | DELANO | 6529 | 2019-04-12 | Yes |
| 661-709 | DELANO | 6529 | 2001-10-10 | Yes |
| 661-735 | BKFD SOUTH | 6529 | 2002-03-12 | Yes |
| 661-736 | ARVIN | 6529 | 2024-09-17 | Yes |
| 661-750 | TEHACHAPI | 6529 | 2001-11-13 | Yes |
| 661-770 | TAFT | 6529 | — | Yes |
| 661-794 | PLDL PLDL | 6529 | 2006-02-22 | Yes |
| 661-816 | PLDL PLDL | 6529 | — | Yes |
| 661-825 | TEHACHAPI | 6529 | — | Yes |
| 661-874 | LANCASTER | 6529 | — | Yes |
| 661-877 | SNCA NHCS | 6529 | — | Yes |
| 661-936 | PLDL PLDL | 6529 | 2021-11-15 | Yes |
| 661-996 | BKFD MAIN | 6529 | 2024-01-23 | 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.