Phone numbers in Mont Belvieu, Texas
Mont Belvieu has 8 phone prefixes in area codes 281, 346, 832.
Biggest holders: Frontier, Onvoy, Grande Communications Networks. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 38%
- Internet / business phone carrier 50%
- Phone company 12%
Every prefix in Mont Belvieu
Search the first six digits of a number in this list. If it's here, the number started in Mont Belvieu with the carrier shown. If it isn't, check the Texas page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 281-385 | Frontier | Local phone company | – |
| 281-576 | Frontier | Local phone company | – |
| 281-751 | Grande Communications Networks | Phone company | – |
| 346-567 | Onvoy | Internet / business phone carrier | 2019 |
| 346-881 | Bandwidth | Internet / business phone carrier | 2025 |
| 346-910 | Onvoy | Internet / business phone carrier | 2020 |
| 832-307 | Onvoy | Internet / business phone carrier | – |
| 832-501 | Frontier | Local phone company | 2013 |
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.