Phone numbers in Dewey, Oklahoma
Dewey has 5 phone prefixes in area codes 539, 918.
Biggest holders: T-Mobile (including Sprint), AT&T (local phone), Ringer Mobile. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 80%
- Local phone company 20%
Every prefix in Dewey
Search the first six digits of a number in this list. If it's here, the number started in Dewey with the carrier shown. If it isn't, check the Oklahoma page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 539-231 | T-Mobile (including Sprint) | Mobile carrier | 2019 |
| 918-534 | AT&T (local phone) | Local phone company | – |
| 918-620 | Ringer Mobile | Mobile carrier | 2024 |
| 918-860 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 918-972 | AT&T Mobility | Mobile carrier | 2016 |
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.