Phone numbers in Oneida, Tennessee
Oneida has 7 phone prefixes in area code 423.
Biggest holders: AT&T Mobility, Highland Tel. Coop, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 71%
- Phone company 29%
Every prefix in Oneida
Search the first six digits of a number in this list. If it's here, the number started in Oneida with the carrier shown. If it isn't, check the Tennessee page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 423-215 | Verizon Wireless | Mobile carrier | 2004 |
| 423-223 | AT&T Mobility | Mobile carrier | 2006 |
| 423-286 | Highland Tel. Coop | Phone company | – |
| 423-539 | AT&T Mobility | Mobile carrier | – |
| 423-569 | Highland Tel. Coop | Phone company | – |
| 423-577 | AT&T Mobility | Mobile carrier | – |
| 423-918 | AT&T Mobility | Mobile carrier | 2024 |
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.