All assignees
778 prefixes in 423 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 423-700 | XXXXXXXXXX | MULT | — | — |
| 423-701 | ROBBINS | 6278 | 2014-01-30 | Yes |
| 423-702 | CHATTNOOGA | 4806 | 2006-02-14 | Yes |
| 423-703 | COKERCREEK | 525E | 2019-11-21 | Yes |
| 423-704 | CHATTNOOGA | 6214 | — | Yes |
| 423-705 | JOHNSON CY | 478J | 2021-12-02 | Yes |
| 423-707 | ELIZABTHTN | 6214 | 2009-12-11 | Yes |
| 423-708 | CHATTNOOGA | 5562 | 2014-10-08 | Yes |
| 423-709 | CLEVELAND | 829J | — | Yes |
| 423-710 | CHATTNOOGA | 318J | 2007-06-19 | Yes |
| 423-711 | XXXXXXXXXX | MULT | — | — |
| 423-712 | BLUFF CITY | 124F | 2015-01-26 | Yes |
| 423-713 | CHATTNOOGA | 318J | 2015-06-05 | Yes |
| 423-714 | MORRISTOWN | 829J | — | Yes |
| 423-715 | CLEVELAND | 6673 | — | Yes |
| 423-716 | CLEVELAND | 829J | — | Yes |
| 423-717 | ATHENS | 7476 | 2015-04-29 | Yes |
| 423-718 | CHATTNOOGA | 6673 | — | — |
| 423-719 | CHATTNOOGA | 478J | 2021-12-02 | Yes |
| 423-720 | NEWPORT | 124F | 2015-05-20 | Yes |
| 423-721 | NEWPORT | 6278 | — | Yes |
| 423-722 | JOHNSON CY | 4806 | — | Yes |
| 423-723 | KINGSPORT | 4806 | — | Yes |
| 423-724 | SNEEDVILLE | 829J | — | Yes |
| 423-725 | HAMPTON | 4510 | — | — |
| 423-726 | MIDWAY SUL | 6673 | — | Yes |
| 423-727 | MOUNTAINCY | 4510 | — | — |
| 423-728 | CLEVELAND | 9419 | — | Yes |
| 423-729 | FLCRKFALLS | 792K | 2024-06-25 | Yes |
| 423-730 | RICEVILLE | 318J | 2007-02-26 | Yes |
| 423-731 | NEWTAZWELL | 792K | 2025-11-18 | Yes |
| 423-732 | KINGSPORT | 6673 | 2015-08-11 | Yes |
| 423-733 | SNEEDVILLE | 9419 | — | Yes |
| 423-734 | ROGERSVL | 525E | 2020-01-09 | Yes |
| 423-735 | ERWIN | 4510 | — | Yes |
| 423-736 | MORRISTOWN | 6673 | — | Yes |
| 423-737 | JOHNSON CY | 6214 | — | — |
| 423-738 | BRISTOL | 6214 | 2021-12-14 | Yes |
| 423-739 | SHADY VLY | 0501 | — | — |
| 423-740 | CLEVELAND | 6673 | 2021-12-15 | Yes |
| 423-741 | JOHNSON CY | 6214 | — | — |
| 423-742 | BRISTOL | 6673 | — | Yes |
| 423-743 | ERWIN | 4510 | — | — |
| 423-744 | ATHENS | 9419 | — | Yes |
| 423-745 | ATHENS | 9419 | — | — |
| 423-746 | ATHENS | 9419 | — | Yes |
| 423-747 | JOHNSON CY | 6214 | — | — |
| 423-748 | MORRISTOWN | 6214 | — | — |
| 423-749 | COLLEGEDL | 5562 | 2021-12-29 | Yes |
| 423-750 | CHATTNOOGA | 622J | 2021-09-03 | Yes |
| 423-751 | CHATTNOOGA | 9419 | — | — |
| 423-752 | CHATTNOOGA | 9419 | — | — |
| 423-753 | JONESBORO | 4510 | — | — |
| 423-754 | ROGERSVL | 6673 | — | Yes |
| 423-755 | CHATTNOOGA | 9419 | — | Yes |
| 423-756 | CHATTNOOGA | 9419 | — | — |
| 423-757 | CHATTNOOGA | 9419 | — | — |
| 423-758 | BRISTOL | 829J | — | Yes |
| 423-759 | MORRISTOWN | 525E | 2021-09-01 | Yes |
| 423-760 | CHATTNOOGA | 6214 | — | Yes |
| 423-761 | COPPERBSIN | 4806 | 2006-08-01 | Yes |
| 423-762 | CHATTNOOGA | 6673 | — | Yes |
| 423-763 | CHATTNOOGA | 9419 | — | Yes |
| 423-764 | BRISTOL | 4510 | — | — |
| 423-765 | KINGSPORT | 792K | 2004-12-02 | Yes |
| 423-766 | LIMESTONE | 525E | 2021-01-20 | Yes |
| 423-767 | JOHNSON CY | 6214 | 2001-01-09 | Yes |
| 423-768 | BUTLER | 4510 | — | — |
| 423-769 | BENTON | 124F | 2021-12-15 | Yes |
| 423-770 | CHURCHHILL | 525E | 2018-08-16 | Yes |
| 423-771 | CHATTNOOGA | 516C | 2010-01-06 | Yes |
| 423-772 | ROAN MT | 4510 | — | — |
| 423-773 | JOHNSON CY | 8645 | 2001-02-09 | — |
| 423-774 | SODDYDAISY | 6214 | — | Yes |
| 423-775 | DAYTON | 9419 | — | — |
| 423-776 | PIKEVILLE | 6214 | 2021-12-30 | Yes |
| 423-777 | CHATTNOOGA | 525E | 2014-10-06 | Yes |
| 423-778 | CHATTNOOGA | 9419 | — | — |
| 423-779 | CHATTNOOGA | 829J | — | Yes |
| 423-780 | CHARLESTON | 9419 | — | Yes |
| 423-781 | ETOWAH | 4806 | 2004-03-01 | Yes |
| 423-782 | KINGSPORT | 829J | — | Yes |
| 423-783 | GREENEVL | 4510 | — | — |
| 423-784 | JELLICO | 9419 | — | — |
| 423-785 | CHATTNOOGA | 9419 | — | Yes |
| 423-786 | BLUFF CITY | 525E | 2023-08-11 | Yes |
| 423-787 | GREENEVL | 4510 | — | — |
| 423-788 | JONESBORO | 4510 | — | Yes |
| 423-789 | BRISTOL | 4510 | 2002-08-13 | Yes |
| 423-790 | CLEVELAND | 792K | 2006-04-12 | Yes |
| 423-791 | JOHNSON CY | 8645 | — | Yes |
| 423-792 | OAKDALE | 490J | 2024-02-21 | Yes |
| 423-793 | BRISTOL | 4806 | — | Yes |
| 423-794 | JOHNSON CY | 829J | — | Yes |
| 423-795 | JOHNSON CY | 6630 | — | — |
| 423-796 | JOHNSON CY | 490J | 2022-02-01 | Yes |
| 423-797 | BRISTOL | 6673 | — | Yes |
| 423-798 | GREENEVL | 4510 | — | — |
| 423-799 | SPRINGCITY | 4806 | 2004-10-26 | Yes |
| 423-800 | CHATTNOOGA | 6214 | 2011-02-10 | 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.