QWEST CORPORATION
201 prefixes in 520 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 520-573 | TUCSON | 9636 | — | — |
| 520-574 | TUCSON | 9636 | — | — |
| 520-575 | TUCSON | 9636 | — | — |
| 520-576 | TUCSON | 9636 | — | Yes |
| 520-577 | TUCSON | 9636 | — | — |
| 520-578 | TUCSON | 9636 | — | — |
| 520-579 | TUCSON | 9636 | — | — |
| 520-584 | TUCSON | 9636 | — | — |
| 520-586 | BENSON | 9636 | — | — |
| 520-615 | TUCSON | 9636 | — | — |
| 520-616 | TUCSON | 9636 | — | Yes |
| 520-617 | TUCSON | 9636 | — | — |
| 520-620 | TUCSON | 9636 | — | — |
| 520-621 | TUCSON | 9636 | — | — |
| 520-622 | TUCSON | 9636 | — | — |
| 520-623 | TUCSON | 9636 | — | — |
| 520-624 | TUCSON | 9636 | — | — |
| 520-625 | TUCSON | 9636 | — | — |
| 520-626 | TUCSON | 9636 | — | — |
| 520-628 | TUCSON | 9636 | — | Yes |
| 520-629 | TUCSON | 9636 | — | — |
| 520-638 | TUCSON | 9636 | 2008-04-28 | Yes |
| 520-647 | TUCSON | 9636 | — | Yes |
| 520-648 | TUCSON | 9636 | — | — |
| 520-652 | WHITLOW | 9636 | 2022-03-01 | Yes |
| 520-662 | TUCSON | 9636 | 2004-06-11 | Yes |
| 520-663 | TUCSON | 9636 | — | — |
| 520-664 | TUCSON | 9636 | — | Yes |
| 520-665 | TUCSON | 9636 | — | Yes |
| 520-670 | TUCSON | 9636 | — | — |
| 520-682 | TUCSON | 9636 | — | — |
| 520-689 | SUPERIOR | 9636 | — | Yes |
| 520-690 | TUCSON | 9636 | — | — |
| 520-695 | TUCSON | 9636 | — | — |
| 520-696 | TUCSON | 9636 | — | — |
| 520-712 | TUCSON | 9636 | — | — |
| 520-720 | BENSON | 9636 | — | Yes |
| 520-721 | TUCSON | 9636 | — | — |
| 520-722 | TUCSON | 9636 | — | — |
| 520-723 | CASAGRANDE | 9636 | — | — |
| 520-724 | TUCSON | 9636 | 2011-02-02 | Yes |
| 520-731 | TUCSON | 9636 | — | — |
| 520-733 | TUCSON | 9636 | — | — |
| 520-740 | TUCSON | 9636 | — | — |
| 520-741 | TUCSON | 9636 | — | — |
| 520-742 | TUCSON | 9636 | — | — |
| 520-743 | TUCSON | 9636 | — | Yes |
| 520-744 | TUCSON | 9636 | — | — |
| 520-745 | TUCSON | 9636 | — | — |
| 520-746 | TUCSON | 9636 | — | — |
| 520-747 | TUCSON | 9636 | — | — |
| 520-748 | TUCSON | 9636 | — | — |
| 520-749 | TUCSON | 9636 | — | — |
| 520-750 | TUCSON | 9636 | — | Yes |
| 520-751 | TUCSON | 9636 | — | — |
| 520-760 | TUCSON | 9636 | — | — |
| 520-761 | NOGALES | 9636 | — | — |
| 520-762 | TUCSON | 9636 | — | Yes |
| 520-770 | TUCSON | 9636 | — | Yes |
| 520-784 | TUCSON | 9636 | — | Yes |
| 520-790 | TUCSON | 9636 | — | — |
| 520-791 | TUCSON | 9636 | — | — |
| 520-792 | TUCSON | 9636 | — | — |
| 520-793 | TUCSON | 9636 | — | — |
| 520-794 | TUCSON | 9636 | — | — |
| 520-795 | TUCSON | 9636 | — | — |
| 520-797 | TUCSON | 9636 | — | — |
| 520-798 | TUCSON | 9636 | — | — |
| 520-799 | TUCSON | 9636 | — | — |
| 520-803 | SIERRAVIST | 9636 | — | — |
| 520-805 | DOUGLAS | 9636 | — | Yes |
| 520-806 | TUCSON | 9636 | — | Yes |
| 520-807 | TUCSON | 9636 | — | — |
| 520-818 | TUCSON | 9636 | — | Yes |
| 520-822 | TUCSON | 9636 | — | Yes |
| 520-825 | TUCSON | 9636 | — | — |
| 520-836 | CASAGRANDE | 9636 | — | — |
| 520-838 | TUCSON | 9636 | 2001-01-26 | Yes |
| 520-858 | CASAGRANDE | 9636 | 2007-11-07 | Yes |
| 520-866 | CASAGRANDE | 9636 | 2001-08-17 | Yes |
| 520-868 | CASAGRANDE | 9636 | — | — |
| 520-872 | TUCSON | 9636 | — | — |
| 520-873 | TUCSON | 9636 | — | Yes |
| 520-874 | TUCSON | 9636 | — | Yes |
| 520-876 | CASAGRANDE | 9636 | — | — |
| 520-877 | TUCSON | 9636 | — | Yes |
| 520-878 | TUCSON | 9636 | — | Yes |
| 520-879 | TUCSON | 9636 | — | — |
| 520-880 | TUCSON | 9636 | — | — |
| 520-881 | TUCSON | 9636 | — | — |
| 520-882 | TUCSON | 9636 | — | — |
| 520-883 | TUCSON | 9636 | — | — |
| 520-884 | TUCSON | 9636 | — | Yes |
| 520-885 | TUCSON | 9636 | — | — |
| 520-886 | TUCSON | 9636 | — | — |
| 520-887 | TUCSON | 9636 | — | — |
| 520-888 | TUCSON | 9636 | — | — |
| 520-889 | TUCSON | 9636 | — | — |
| 520-896 | SAN MANUEL | 9636 | — | Yes |
| 520-903 | TUCSON | 9636 | — | 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.