Phone numbers in South Williamson, Kentucky
South Williamson has 7 phone prefixes in area code 606.
Biggest holders: Appalachian Wireless, AT&T (local phone), Level 3 (Lumen). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 43%
- Local phone company 14%
- Internet / business phone carrier 29%
- Phone company 14%
Every prefix in South Williamson
Search the first six digits of a number in this list. If it's here, the number started in South Williamson with the carrier shown. If it isn't, check the Kentucky page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 606-237 | AT&T (local phone) | Local phone company | – |
| 606-257 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 606-525 | Appalachian Wireless | Mobile carrier | 2008 |
| 606-603 | AT&T Mobility | Mobile carrier | 2002 |
| 606-607 | Onvoy | Internet / business phone carrier | – |
| 606-625 | Appalachian Wireless | Mobile carrier | 2003 |
| 606-969 | Mikrotec Communications | Phone company | – |
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.