All assignees
778 prefixes in 423 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 423-801 | CUMBERLDGP | 6278 | 2007-12-19 | Yes |
| 423-802 | CHATTNOOGA | 6673 | — | — |
| 423-803 | CHATTNOOGA | 4645 | 2016-01-04 | Yes |
| 423-804 | BRISTOL | 124F | 2022-02-03 | Yes |
| 423-805 | CHATTNOOGA | 525E | — | Yes |
| 423-806 | MIDWAY | 124F | 2015-05-20 | Yes |
| 423-807 | MADISONVL | 6214 | — | Yes |
| 423-808 | TELLICO PL | 318J | 2007-09-14 | Yes |
| 423-809 | PIKEVILLE | 4806 | 2023-05-18 | Yes |
| 423-810 | CHARLESTON | 114F | 2015-08-03 | Yes |
| 423-811 | XXXXXXXXXX | MULT | — | — |
| 423-812 | GREENEVL | 124F | 2016-08-23 | Yes |
| 423-813 | CLEVELAND | 6673 | 2015-10-08 | Yes |
| 423-814 | SWEETWATER | 073H | — | Yes |
| 423-815 | WHITWELL | 318J | 2007-09-14 | Yes |
| 423-816 | BRISTOL | 6214 | 2022-12-01 | Yes |
| 423-817 | KINGSPORT | 5562 | — | Yes |
| 423-818 | JELLICO | 525E | 2016-09-21 | Yes |
| 423-819 | CLEVELAND | 732J | — | Yes |
| 423-820 | GREENEVL | 525E | 2018-05-17 | Yes |
| 423-821 | CHATTNOOGA | 9419 | — | — |
| 423-822 | CHATTNOOGA | 9419 | — | Yes |
| 423-823 | GREENEVL | 8645 | — | Yes |
| 423-824 | ERWIN | 525E | 2023-08-11 | Yes |
| 423-825 | CHATTNOOGA | 9419 | — | Yes |
| 423-826 | CHATTNOOGA | 829J | — | Yes |
| 423-827 | CHATTNOOGA | 9419 | — | Yes |
| 423-829 | CHARLESTON | 6214 | — | Yes |
| 423-830 | KINGSPORT | 525E | 2018-05-17 | Yes |
| 423-831 | GREENEVL | 732J | 2023-03-02 | Yes |
| 423-832 | CLINCHPORT | 516J | 2022-01-13 | Yes |
| 423-833 | JOHNSON CY | 8645 | — | Yes |
| 423-834 | CHATTNOOGA | 4806 | — | Yes |
| 423-835 | BRISTOL | 6214 | 2023-03-16 | Yes |
| 423-836 | SWEETWATER | 6673 | — | Yes |
| 423-837 | SO PITTSBG | 9419 | — | — |
| 423-838 | CHATTNOOGA | 6214 | — | Yes |
| 423-839 | MORRISTOWN | 792K | — | Yes |
| 423-840 | BUTLER | 525E | 2018-05-17 | Yes |
| 423-841 | MOUNTAINCY | 8645 | 2023-04-06 | Yes |
| 423-842 | CHATTNOOGA | 9419 | — | — |
| 423-843 | CHATTNOOGA | 9419 | — | — |
| 423-844 | BRISTOL | 4510 | — | Yes |
| 423-845 | BRISTOL | 6673 | 2005-03-30 | Yes |
| 423-846 | CHATTNOOGA | 9419 | — | — |
| 423-847 | CHATTNOOGA | 9419 | — | Yes |
| 423-848 | JOHNSON CY | 622J | 2021-09-03 | Yes |
| 423-849 | JOHNSON CY | 6214 | 2023-05-05 | Yes |
| 423-850 | JONESBORO | 525E | 2018-05-21 | Yes |
| 423-851 | NEWTAZWELL | 0557 | — | — |
| 423-852 | DUNLAP | 4806 | 2023-05-18 | Yes |
| 423-853 | JOHNSON CY | 506J | 2022-01-21 | Yes |
| 423-854 | JOHNSON CY | 4510 | — | — |
| 423-855 | CHATTNOOGA | 9419 | — | — |
| 423-856 | ATHENS | 7476 | 2016-09-16 | Yes |
| 423-857 | KINGSPORT | 4510 | — | — |
| 423-858 | BLOUNTVL | 525E | 2023-08-11 | Yes |
| 423-859 | ROGERSVL | 525E | 2023-05-31 | Yes |
| 423-860 | CHATTNOOGA | 939H | 2022-07-01 | Yes |
| 423-862 | SPRINGCITY | 525E | 2023-08-22 | Yes |
| 423-863 | KINGSPORT | 6673 | — | Yes |
| 423-864 | DECATUR | 624H | 2023-05-18 | Yes |
| 423-866 | NIOTA | 318J | 2023-08-07 | Yes |
| 423-867 | CHATTNOOGA | 9419 | — | — |
| 423-868 | MOSHEIM | 525E | 2023-08-22 | Yes |
| 423-869 | CUMBERLDGP | 9419 | — | Yes |
| 423-870 | CHATTNOOGA | 9419 | — | — |
| 423-871 | LAFOLLETTE | 6214 | — | Yes |
| 423-872 | CHATTNOOGA | 145J | 2023-05-23 | Yes |
| 423-873 | STONEY CRK | 965H | 2020-07-15 | Yes |
| 423-874 | CHATTNOOGA | 9419 | — | Yes |
| 423-875 | CHATTNOOGA | 9419 | — | — |
| 423-876 | CHATTNOOGA | 9419 | — | Yes |
| 423-877 | CHATTNOOGA | 9419 | — | — |
| 423-878 | BRISTOL | 4510 | — | — |
| 423-879 | GEORGETOWN | 525E | 2023-08-22 | Yes |
| 423-880 | JOHNSON CY | 525E | 2021-03-31 | Yes |
| 423-881 | FLCRKFALLS | 0554 | — | — |
| 423-882 | CHATTNOOGA | 9419 | 2011-10-26 | Yes |
| 423-883 | CHATTNOOGA | 9419 | — | Yes |
| 423-884 | VONORE | 0578 | — | — |
| 423-885 | ENGLEWOOD | 525E | — | Yes |
| 423-886 | CHATTNOOGA | 9419 | — | — |
| 423-887 | ENGLEWOOD | 0578 | — | Yes |
| 423-888 | CHATTNOOGA | 525E | 2015-08-17 | Yes |
| 423-889 | CLEVELAND | 7473 | 2023-08-30 | Yes |
| 423-890 | BRISTOL | 6214 | 2023-09-06 | Yes |
| 423-892 | CHATTNOOGA | 9419 | — | — |
| 423-893 | CHATTNOOGA | 9419 | — | Yes |
| 423-894 | CHATTNOOGA | 9419 | — | — |
| 423-895 | ELIZABTHTN | 8645 | — | Yes |
| 423-896 | HAMPTON | 4510 | — | Yes |
| 423-897 | FALLBRANCH | 4510 | — | Yes |
| 423-898 | CHARLESTON | 7473 | 2023-10-12 | Yes |
| 423-899 | CHATTNOOGA | 9419 | — | — |
| 423-900 | JOHNSON CY | 525E | 2011-02-16 | Yes |
| 423-902 | CHATTNOOGA | 6214 | — | — |
| 423-903 | CHATTNOOGA | 6214 | — | — |
| 423-904 | CHATTNOOGA | 624H | 2021-04-13 | Yes |
| 423-905 | JOHNSON CY | 624H | 2021-04-13 | 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.