Phone numbers in Thornton, Texas
Thornton has 4 phone prefixes in area code 254.
Biggest holders: Onvoy, Ama*techtel Communications-tx, Brightspeed Of Eastern Texas. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 50%
- Internet / business phone carrier 50%
Every prefix in Thornton
Search the first six digits of a number in this list. If it's here, the number started in Thornton with the carrier shown. If it isn't, check the Texas page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 254-306 | Onvoy | Internet / business phone carrier | 2017 |
| 254-380 | Ama*techtel Communications-tx | Local phone company | 2015 |
| 254-385 | Brightspeed Of Eastern Texas | Local phone company | – |
| 254-439 | Onvoy | Internet / business phone carrier | 2021 |
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.