All assignees
326 prefixes in 623 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 623-535 | PHOENIX | 9636 | — | — |
| 623-536 | PHOENIX | 9636 | — | — |
| 623-537 | PHOENIX | 9636 | — | Yes |
| 623-544 | PHOENIX | 9636 | — | — |
| 623-546 | PHOENIX | 9636 | — | — |
| 623-547 | PHOENIX | 9636 | — | Yes |
| 623-551 | PHOENIX | 9636 | — | — |
| 623-552 | PHOENIX | 6529 | 2008-07-23 | Yes |
| 623-555 | DIR ASST | MULT | — | — |
| 623-556 | PHOENIX | 9636 | — | Yes |
| 623-561 | PHOENIX | 9636 | — | — |
| 623-562 | PHOENIX | 318J | — | Yes |
| 623-565 | PHOENIX | 7175 | 2007-06-27 | Yes |
| 623-566 | PHOENIX | 9636 | — | — |
| 623-570 | PHOENIX | 6529 | — | — |
| 623-572 | PHOENIX | 9636 | — | — |
| 623-580 | PHOENIX | 9636 | — | — |
| 623-581 | PHOENIX | 9636 | — | Yes |
| 623-582 | PHOENIX | 9636 | — | — |
| 623-583 | PHOENIX | 9636 | — | — |
| 623-584 | PHOENIX | 9636 | — | — |
| 623-587 | PHOENIX | 9636 | — | — |
| 623-594 | PHOENIX | 318J | — | — |
| 623-600 | PHOENIX | 965H | 2019-09-13 | Yes |
| 623-606 | PHOENIX | 6010 | — | Yes |
| 623-611 | XXXXXXXXXX | MULT | — | — |
| 623-624 | PHOENIX | 630E | 2021-08-12 | Yes |
| 623-628 | PHOENIX | 6529 | — | — |
| 623-632 | PHOENIX | 624H | 2020-06-22 | Yes |
| 623-633 | PHOENIX | 6572 | 2015-01-15 | Yes |
| 623-640 | PHOENIX | 6572 | — | — |
| 623-643 | PHOENIX | 9636 | — | Yes |
| 623-663 | PHOENIX | 630E | 2020-03-05 | Yes |
| 623-666 | PHOENIX | 630E | 2012-11-19 | Yes |
| 623-670 | PHOENIX | 6572 | — | Yes |
| 623-680 | PHOENIX | 6572 | — | — |
| 623-683 | PHOENIX | 318J | — | Yes |
| 623-687 | PHOENIX | 7229 | — | Yes |
| 623-688 | PHOENIX | 6572 | — | Yes |
| 623-691 | PHOENIX | 9636 | — | Yes |
| 623-692 | PHOENIX | 6572 | 2002-10-14 | Yes |
| 623-693 | PHOENIX | 6572 | 2002-10-14 | Yes |
| 623-694 | PHOENIX | 6572 | — | — |
| 623-695 | PHOENIX | 6572 | — | — |
| 623-696 | PHOENIX | 6572 | 2002-10-14 | Yes |
| 623-698 | PHOENIX | 6572 | 2002-10-14 | Yes |
| 623-700 | — | — | ||
| 623-703 | PHOENIX | 6529 | — | Yes |
| 623-707 | PHOENIX | 7217 | — | Yes |
| 623-711 | XXXXXXXXXX | MULT | — | — |
| 623-715 | PHOENIX | 7217 | 2001-01-24 | Yes |
| 623-734 | PHOENIX | 7229 | — | Yes |
| 623-738 | PHOENIX | 3285 | 2009-05-19 | Yes |
| 623-742 | PHOENIX | 9636 | — | Yes |
| 623-745 | PHOENIX | 7229 | 2015-09-28 | Yes |
| 623-748 | PHOENIX | 3285 | 2002-04-19 | Yes |
| 623-755 | PHOENIX | 6010 | 2008-09-09 | Yes |
| 623-759 | PHOENIX | 7229 | 2015-02-11 | Yes |
| 623-760 | PHOENIX | 7217 | — | Yes |
| 623-764 | PHOENIX | 5562 | — | Yes |
| 623-772 | PHOENIX | 9636 | — | — |
| 623-773 | PHOENIX | 9636 | — | — |
| 623-776 | PHOENIX | 9636 | — | Yes |
| 623-777 | PHOENIX | 579F | 2012-03-05 | Yes |
| 623-780 | PHOENIX | 9636 | — | — |
| 623-792 | PHOENIX | 7552 | — | Yes |
| 623-800 | PHOENIX | 630E | 2013-10-24 | Yes |
| 623-806 | PHOENIX | 947E | 2008-08-26 | Yes |
| 623-810 | PHOENIX | 6572 | — | — |
| 623-811 | XXXXXXXXXX | MULT | — | — |
| 623-815 | PHOENIX | 9636 | — | — |
| 623-824 | PHOENIX | 7217 | — | Yes |
| 623-825 | PHOENIX | 9636 | — | — |
| 623-826 | PHOENIX | 6572 | 2002-06-17 | — |
| 623-832 | PHOENIX | 9636 | 2010-07-06 | Yes |
| 623-842 | PHOENIX | 9636 | — | — |
| 623-845 | PHOENIX | 9636 | — | Yes |
| 623-846 | PHOENIX | 9636 | — | — |
| 623-847 | PHOENIX | 9636 | — | — |
| 623-848 | PHOENIX | 9636 | — | — |
| 623-849 | PHOENIX | 9636 | — | — |
| 623-850 | PHOENIX | 7175 | — | Yes |
| 623-853 | PHOENIX | 9636 | — | Yes |
| 623-856 | PHOENIX | 9636 | — | — |
| 623-866 | PHOENIX | 9636 | — | Yes |
| 623-869 | PHOENIX | 9636 | — | — |
| 623-872 | PHOENIX | 9636 | — | — |
| 623-873 | PHOENIX | 9636 | — | — |
| 623-875 | PHOENIX | 9636 | — | — |
| 623-876 | PHOENIX | 9636 | 2001-04-24 | — |
| 623-877 | PHOENIX | 9636 | — | — |
| 623-878 | PHOENIX | 9636 | — | — |
| 623-879 | PHOENIX | 9636 | — | Yes |
| 623-882 | PHOENIX | 9636 | — | Yes |
| 623-887 | PHOENIX | 630E | 2021-04-21 | Yes |
| 623-888 | PHOENIX | 579F | 2012-05-23 | Yes |
| 623-889 | PHOENIX | 7175 | — | Yes |
| 623-900 | PHOENIX | 630E | 2015-02-17 | Yes |
| 623-907 | PHOENIX | 9636 | — | — |
| 623-910 | PHOENIX | 6572 | — | — |
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.