Phone numbers in Calhoun, Kentucky
Calhoun has 6 phone prefixes in area code 270.
Biggest holders: Onvoy, AT&T Mobility, AT&T (local phone). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 33%
- Local phone company 17%
- Internet / business phone carrier 50%
Every prefix in Calhoun
Search the first six digits of a number in this list. If it's here, the number started in Calhoun with the carrier shown. If it isn't, check the Kentucky page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 270-273 | AT&T (local phone) | Local phone company | – |
| 270-280 | AT&T Mobility | Mobile carrier | – |
| 270-470 | Onvoy | Internet / business phone carrier | – |
| 270-499 | AT&T Mobility | Mobile carrier | 2001 |
| 270-513 | Onvoy | Internet / business phone carrier | – |
| 270-637 | Onvoy | 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.