Phone numbers in Harlan, Kentucky
Harlan has 9 phone prefixes in area code 606.
Biggest holders: AT&T Mobility, Onvoy, AT&T (local phone). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 33%
- Local phone company 22%
- Internet / business phone carrier 44%
Every prefix in Harlan
Search the first six digits of a number in this list. If it's here, the number started in Harlan with the carrier shown. If it isn't, check the Kentucky page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 606-273 | AT&T Mobility | Mobile carrier | 2002 |
| 606-503 | Onvoy | Internet / business phone carrier | – |
| 606-505 | Appalachian Wireless | Mobile carrier | 2007 |
| 606-562 | AT&T Mobility | Mobile carrier | – |
| 606-573 | AT&T (local phone) | Local phone company | – |
| 606-574 | AT&T (local phone) | Local phone company | – |
| 606-621 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 606-714 | Onvoy | Internet / business phone carrier | – |
| 606-909 | Level 3 (Lumen) | Internet / business phone carrier | – |
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.