Phone numbers in Williamson, West Virginia
Williamson has 5 phone prefixes in area codes 304, 681.
Biggest holders: Frontier, Appalachian Wireless, Fibernet. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 20%
- Local phone company 40%
- Internet / business phone carrier 40%
Every prefix in Williamson
Search the first six digits of a number in this list. If it's here, the number started in Williamson with the carrier shown. If it isn't, check the West Virginia page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 304-235 | Frontier | Local phone company | – |
| 304-236 | Frontier | Local phone company | – |
| 304-443 | Appalachian Wireless | Mobile carrier | 2008 |
| 304-899 | Fibernet | Internet / business phone carrier | – |
| 681-821 | Onvoy | Internet / business phone carrier | 2020 |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number. Source: NANPA central office code records, 2026-10-10.