All assignees
778 prefixes in 423 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 423-906 | JOHNSON CY | 475J | 2023-10-24 | Yes |
| 423-907 | LAFOLLETTE | 9419 | — | Yes |
| 423-908 | SURGOINSVL | 939H | 2024-01-09 | Yes |
| 423-909 | SO PITTSBG | 624H | 2023-05-18 | Yes |
| 423-910 | OOLTEWAH | 318J | 2007-03-19 | Yes |
| 423-911 | XXXXXXXXXX | MULT | — | — |
| 423-912 | LAFOLLETTE | 6214 | — | Yes |
| 423-913 | JONESBORO | 4510 | — | Yes |
| 423-914 | BRISTOL | 6673 | — | — |
| 423-915 | JOHNSON CY | 4510 | — | Yes |
| 423-917 | BLOUNTVL | 4510 | — | — |
| 423-918 | ONEIDA | 6214 | 2024-12-12 | Yes |
| 423-919 | NEWTAZWELL | 525E | 2019-10-01 | Yes |
| 423-920 | ATHENS | 6214 | — | Yes |
| 423-921 | ROGERSVL | 9419 | — | Yes |
| 423-922 | BAILEYTON | 965H | 2020-07-15 | Yes |
| 423-923 | ROGERSVL | 6214 | — | Yes |
| 423-924 | JOHNSON CY | 276F | 2025-03-10 | Yes |
| 423-925 | LAFOLLETTE | 516J | 2022-03-23 | Yes |
| 423-926 | JOHNSON CY | 4510 | — | — |
| 423-927 | MORRISTOWN | 516J | 2022-03-01 | Yes |
| 423-928 | JOHNSON CY | 4510 | — | — |
| 423-929 | JOHNSON CY | 4510 | — | — |
| 423-930 | JOHNSON CY | 3185 | 2009-02-13 | Yes |
| 423-932 | ETOWAH | 516J | 2022-01-20 | Yes |
| 423-933 | CHATTNOOGA | 829J | 2002-06-14 | Yes |
| 423-934 | SURGOINSVL | 516J | 2021-03-18 | Yes |
| 423-936 | SUNBRIGHT | 318J | 2024-05-14 | Yes |
| 423-938 | JOHNSON CY | 4510 | 2002-08-13 | — |
| 423-939 | JASPER | 829J | 2005-06-21 | Yes |
| 423-940 | DAYTON | 939H | 2023-03-20 | Yes |
| 423-941 | DEER LODGE | 318J | 2024-05-14 | Yes |
| 423-942 | JASPER | 9419 | — | — |
| 423-943 | JOHNSON CY | 8645 | — | Yes |
| 423-944 | CLINCHPORT | 0248 | — | — |
| 423-945 | COLLEGESTA | 792K | 2025-06-26 | Yes |
| 423-946 | JOHNSON CY | 8645 | 2001-03-09 | Yes |
| 423-948 | LIMESTONE | 8645 | — | Yes |
| 423-949 | DUNLAP | 0554 | — | Yes |
| 423-950 | — | — | ||
| 423-951 | CHARLESTON | 7473 | 2024-06-06 | Yes |
| 423-952 | JOHNSON CY | 4510 | — | Yes |
| 423-953 | JOHNSON CY | 4510 | — | — |
| 423-954 | CHATTNOOGA | 9419 | — | Yes |
| 423-955 | WHITWELL | 965H | 2020-07-15 | Yes |
| 423-956 | BRISTOL | 6673 | — | — |
| 423-957 | HAMPTON | 8645 | — | Yes |
| 423-958 | — | — | ||
| 423-959 | — | — | ||
| 423-960 | CHATTNOOGA | 276F | 2025-02-24 | Yes |
| 423-961 | GEORGETOWN | 9419 | — | Yes |
| 423-963 | KINGSPORT | 5562 | 2001-03-09 | Yes |
| 423-965 | DEER LODGE | 0565 | — | — |
| 423-966 | BALL PLAY | 965H | 2020-07-15 | Yes |
| 423-967 | KINGSPORT | 5562 | — | Yes |
| 423-968 | BRISTOL | 4510 | — | — |
| 423-969 | CLEVELAND | 6673 | 2025-06-30 | Yes |
| 423-972 | GREENEVL | 8645 | — | Yes |
| 423-973 | SNEEDVILLE | 4806 | 2002-04-30 | Yes |
| 423-975 | JOHNSON CY | 4510 | — | — |
| 423-976 | — | — | ||
| 423-977 | CHATTNOOGA | 965H | 2019-07-18 | Yes |
| 423-978 | CHATTNOOGA | 700J | 2025-07-11 | Yes |
| 423-979 | JOHNSON CY | 4510 | — | Yes |
| 423-980 | CHATTNOOGA | 525E | 2021-03-31 | Yes |
| 423-981 | JOHNSON CY | 700J | 2025-07-11 | Yes |
| 423-987 | CHATTNOOGA | 6214 | — | — |
| 423-989 | BRISTOL | 4510 | — | — |
| 423-990 | BRISTOL | 4510 | — | — |
| 423-991 | CHATTNOOGA | 6214 | — | — |
| 423-992 | BRISTOL | 145J | 2025-08-13 | Yes |
| 423-993 | CHATTNOOGA | 321J | 2025-11-26 | Yes |
| 423-994 | CHATTNOOGA | 6214 | 2007-05-10 | Yes |
| 423-995 | JOHNSON CY | 321J | 2025-11-26 | Yes |
| 423-996 | CHARLESTON | 7473 | 2025-09-25 | Yes |
| 423-997 | ELIZABTHTN | 124F | 2025-08-07 | Yes |
| 423-998 | JELLICO | 939H | 2022-10-10 | Yes |
| 423-999 | ATHENS | 7476 | 2011-03-30 | 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.