Phone numbers in Detroit, Texas
Detroit has 4 phone prefixes in area codes 430, 903.
Biggest holders: T-Mobile (including Sprint), Windstream Comm Sw. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 50%
- Local phone company 50%
Every prefix in Detroit
Search the first six digits of a number in this list. If it's here, the number started in Detroit with the carrier shown. If it isn't, check the Texas page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 430-290 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 903-418 | Windstream Comm Sw | Local phone company | 2015 |
| 903-491 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 903-674 | 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.