T-MOBILE USA, INC.
169 prefixes in 773 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 773-209 | CHICGOZN03 | 6529 | — | Yes |
| 773-216 | CHICGOZN01 | 6529 | — | Yes |
| 773-219 | CHICGOZN07 | 6529 | — | Yes |
| 773-220 | CHICGOZN03 | 6529 | — | Yes |
| 773-225 | CHICGOZN03 | 6529 | 2006-03-15 | Yes |
| 773-226 | CHICGOZN10 | 6529 | 2007-11-27 | Yes |
| 773-236 | CHICGOZN07 | 6529 | 2009-06-26 | Yes |
| 773-240 | CHICGOZN10 | 6529 | 2007-10-16 | Yes |
| 773-263 | CHICGOZN03 | 6529 | — | Yes |
| 773-280 | CHICGOZN06 | 6529 | — | Yes |
| 773-297 | CHICGOZN03 | 6529 | — | Yes |
| 773-301 | CHICGOZN03 | 6529 | — | Yes |
| 773-302 | CHICGOZN02 | 6529 | 2009-02-26 | Yes |
| 773-310 | CHICGOZN10 | 6529 | 2004-03-22 | Yes |
| 773-312 | CHICGOZN02 | 6529 | — | Yes |
| 773-317 | CHICGOZN01 | 6529 | — | Yes |
| 773-319 | CHICGOZN10 | 6529 | — | Yes |
| 773-322 | CHICGOZN07 | 6529 | — | Yes |
| 773-331 | CHICGOZN03 | 6529 | — | Yes |
| 773-354 | CHICGOZN01 | 6529 | — | Yes |
| 773-366 | CHICGOZN10 | 6529 | 2004-09-24 | Yes |
| 773-367 | CHICGOZN03 | 6529 | 2009-02-13 | Yes |
| 773-368 | CHICGOZN03 | 6529 | — | Yes |
| 773-370 | CHICGOZN01 | 6529 | — | Yes |
| 773-386 | CHICGOZN01 | 6529 | — | Yes |
| 773-387 | CHICGOZN10 | 6529 | 2004-06-09 | Yes |
| 773-392 | CHICGOZN01 | 6529 | — | Yes |
| 773-398 | CHICGOZN03 | 6529 | — | Yes |
| 773-403 | CHICGOZN03 | 6529 | — | Yes |
| 773-406 | CHICGOZN07 | 6529 | — | Yes |
| 773-407 | CHICGOZN03 | 6529 | — | Yes |
| 773-408 | CHICGOZN06 | 6529 | 2009-02-13 | Yes |
| 773-410 | CHICGOZN02 | 6529 | — | Yes |
| 773-412 | CHICGOZN03 | 6529 | — | Yes |
| 773-414 | CHICGOZN03 | 6529 | 2004-09-07 | Yes |
| 773-416 | CHICGOZN01 | 6529 | — | Yes |
| 773-418 | CHICGOZN03 | 6529 | — | Yes |
| 773-419 | CHICGOZN01 | 6529 | — | — |
| 773-425 | CHICGOZN03 | 6529 | — | Yes |
| 773-426 | CHICGOZN03 | 6529 | 2002-01-04 | Yes |
| 773-430 | CHICGOZN03 | 6529 | — | Yes |
| 773-433 | CHICGOZN02 | 6529 | — | Yes |
| 773-443 | CHICGOZN01 | 6529 | — | — |
| 773-447 | CHICGOZN01 | 6529 | — | — |
| 773-454 | CHICGOZN03 | 6529 | — | Yes |
| 773-457 | CHICGOZN07 | 6529 | — | Yes |
| 773-459 | CHICGOZN01 | 6529 | — | — |
| 773-461 | CHICGOZN02 | 6529 | 2022-08-24 | Yes |
| 773-469 | CHICGOZN01 | 6529 | — | — |
| 773-491 | CHICGOZN03 | 6529 | — | Yes |
| 773-494 | CHICGOZN03 | 6529 | 2004-10-13 | Yes |
| 773-495 | CHICGOZN01 | 6529 | — | — |
| 773-499 | CHICGOZN03 | 6529 | 2004-09-28 | Yes |
| 773-501 | CHICGOZN03 | 6529 | 2001-02-12 | — |
| 773-503 | CHICGOZN10 | 6529 | 2004-11-17 | Yes |
| 773-507 | CHICGOZN03 | 6529 | 2001-02-14 | Yes |
| 773-510 | CHICGOZN03 | 6529 | 2002-04-04 | — |
| 773-512 | CHICGOZN03 | 6529 | 2004-10-13 | Yes |
| 773-517 | CHICGOZN01 | 6529 | — | — |
| 773-531 | CHICGOZN03 | 6529 | — | Yes |
| 773-540 | CHICGOZN03 | 6529 | 2004-12-28 | Yes |
| 773-543 | CHICGOZN04 | 6529 | 2007-10-26 | Yes |
| 773-544 | CHICGOZN01 | 6529 | — | — |
| 773-552 | CHICGOZN01 | 6529 | — | Yes |
| 773-554 | CHICGOZN03 | 6529 | 2009-07-01 | Yes |
| 773-556 | CHICGOZN03 | 6529 | — | Yes |
| 773-559 | CHICGOZN03 | 6529 | 2005-01-10 | Yes |
| 773-562 | CHICGOZN03 | 6529 | — | Yes |
| 773-563 | CHICGOZN10 | 6529 | 2005-10-19 | Yes |
| 773-574 | CHICGOZN10 | 6529 | 2006-03-21 | Yes |
| 773-587 | CHICGOZN03 | 6529 | 2007-01-08 | Yes |
| 773-592 | CHICGOZN03 | 6529 | — | — |
| 773-593 | CHICGOZN01 | 6529 | — | Yes |
| 773-595 | CHICGOZN07 | 6529 | 2006-10-30 | Yes |
| 773-600 | CHICGOZN10 | 6529 | 2004-07-20 | Yes |
| 773-603 | CHICGOZN10 | 6529 | 2005-06-30 | Yes |
| 773-606 | CHICGOZN03 | 6529 | 2005-07-14 | Yes |
| 773-614 | CHICGOZN10 | 6529 | 2006-11-08 | Yes |
| 773-615 | CHICGOZN10 | 6529 | 2001-11-30 | Yes |
| 773-616 | CHICGOZN01 | 6529 | — | — |
| 773-617 | CHICGOZN01 | 6529 | — | — |
| 773-619 | CHICGOZN03 | 6529 | 2001-03-09 | Yes |
| 773-621 | CHICGOZN03 | 6529 | 2005-10-10 | Yes |
| 773-629 | CHICGOZN10 | 6529 | 2006-11-08 | Yes |
| 773-639 | CHICGOZN03 | 6529 | 2007-10-17 | Yes |
| 773-641 | CHICGOZN03 | 6529 | 2005-09-13 | Yes |
| 773-642 | CHICGOZN03 | 6529 | 2007-03-15 | Yes |
| 773-647 | CHICGOZN03 | 6529 | 2007-10-17 | Yes |
| 773-655 | CHICGOZN03 | 6529 | 2002-03-27 | Yes |
| 773-656 | CHICGOZN10 | 6529 | 2005-06-30 | Yes |
| 773-657 | CHICGOZN03 | 6529 | 2007-03-05 | Yes |
| 773-663 | CHICGOZN03 | 6529 | — | Yes |
| 773-671 | CHICGOZN01 | 6529 | — | Yes |
| 773-672 | CHICGOZN10 | 6529 | 2008-02-29 | Yes |
| 773-678 | CHICGOZN03 | 6529 | 2005-02-21 | Yes |
| 773-679 | CHICGOZN10 | 6529 | 2006-07-26 | Yes |
| 773-690 | CHICGOZN07 | 6529 | 2008-11-05 | Yes |
| 773-691 | CHICGOZN08 | 6529 | 2007-07-10 | Yes |
| 773-698 | CHICGOZN04 | 6529 | 2007-06-13 | Yes |
| 773-699 | CHICGOZN03 | 6529 | 2005-04-19 | 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.