Phone numbers in Fall Branch, Tennessee
Fall Branch has 6 phone prefixes in area code 423.
Biggest holders: T-Mobile (including Sprint), CenturyLink / Lumen, Bandwidth. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 50%
- Local phone company 33%
- Internet / business phone carrier 17%
Every prefix in Fall Branch
Search the first six digits of a number in this list. If it's here, the number started in Fall Branch with the carrier shown. If it isn't, check the Tennessee page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 423-292 | T-Mobile (including Sprint) | Mobile carrier | – |
| 423-348 | CenturyLink / Lumen | Local phone company | – |
| 423-384 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 423-446 | Bandwidth | Internet / business phone carrier | – |
| 423-677 | T-Mobile (including Sprint) | Mobile carrier | – |
| 423-897 | CenturyLink / Lumen | Local 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.