Phone numbers in Dumas, Texas
Dumas has 9 phone prefixes in area code 806.
Biggest holders: Windstream Comm Sw, Verizon Wireless, T-Mobile (including Sprint). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 56%
- Local phone company 33%
- Internet / business phone carrier 11%
Every prefix in Dumas
Search the first six digits of a number in this list. If it's here, the number started in Dumas with the carrier shown. If it isn't, check the Texas page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 806-399 | Windstream Comm Sw | Local phone company | 2004 |
| 806-421 | Level 3 (Lumen) | Internet / business phone carrier | 2007 |
| 806-710 | Verizon Wireless | Mobile carrier | 2020 |
| 806-717 | T-Mobile (including Sprint) | Mobile carrier | 2004 |
| 806-751 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 806-922 | AT&T Mobility | Mobile carrier | – |
| 806-930 | Verizon Wireless | Mobile carrier | – |
| 806-934 | Windstream Comm Sw | Local phone company | – |
| 806-935 | Windstream Comm Sw | 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.