Phone numbers in Prestonsburg, Kentucky
Prestonsburg has 8 phone prefixes in area code 606.
Biggest holders: T-Mobile (including Sprint), Onvoy, AT&T (local phone). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 25%
- Local phone company 25%
- Internet / business phone carrier 38%
- Phone company 12%
Every prefix in Prestonsburg
Search the first six digits of a number in this list. If it's here, the number started in Prestonsburg with the carrier shown. If it isn't, check the Kentucky page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 606-263 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 606-459 | Onvoy | Internet / business phone carrier | – |
| 606-506 | Csc Voice | Internet / business phone carrier | 2013 |
| 606-635 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 606-769 | Onvoy | Internet / business phone carrier | – |
| 606-886 | AT&T (local phone) | Local phone company | – |
| 606-889 | AT&T (local phone) | Local phone company | – |
| 606-949 | 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.