Phone numbers in Grayson, Kentucky
Grayson has 8 phone prefixes in area code 606.
Biggest holders: Windstream Kentucky East, Inc. - Lexington, T-Mobile (including Sprint), Twilio. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 25%
- Local phone company 50%
- Internet / business phone carrier 25%
Every prefix in Grayson
Search the first six digits of a number in this list. If it's here, the number started in Grayson with the carrier shown. If it isn't, check the Kentucky page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 606-227 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 606-255 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 606-458 | Twilio | Internet / business phone carrier | 2024 |
| 606-472 | Windstream Kentucky East, Inc. - Lexington | Local phone company | 2004 |
| 606-474 | Windstream Kentucky East, Inc. - Lexington | Local phone company | – |
| 606-475 | Windstream Kentucky East, Inc. - Lexington | Local phone company | – |
| 606-713 | Onvoy | Internet / business phone carrier | – |
| 606-898 | Windstream Kentucky East, Inc. - Lexington | Local phone company | 2013 |
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.