Phone numbers in Huntsville, Tennessee
Huntsville has 3 phone prefixes in area code 423.
Biggest holders: Highland Tel. Coop, UScellular. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 33%
- Phone company 67%
Every prefix in Huntsville
Search the first six digits of a number in this list. If it's here, the number started in Huntsville with the carrier shown. If it isn't, check the Tennessee page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 423-319 | Highland Tel. Coop | Phone company | – |
| 423-363 | UScellular | Mobile carrier | 2001 |
| 423-663 | Highland Tel. Coop | 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.