Phone numbers in Port Lavaca, Texas
Port Lavaca has 11 phone prefixes in area code 361.
Biggest holders: Frontier, AT&T Mobility, Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 36%
- Local phone company 36%
- Internet / business phone carrier 27%
Every prefix in Port Lavaca
Search the first six digits of a number in this list. If it's here, the number started in Port Lavaca with the carrier shown. If it isn't, check the Texas page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 361-250 | AT&T Mobility | Mobile carrier | 2009 |
| 361-335 | Twilio | Internet / business phone carrier | 2024 |
| 361-365 | Onvoy | Internet / business phone carrier | 2025 |
| 361-482 | Stpcs Joint Venture | Mobile carrier | 2001 |
| 361-487 | Frontier | Local phone company | 2001 |
| 361-551 | Frontier | Local phone company | – |
| 361-552 | Frontier | Local phone company | – |
| 361-553 | Frontier | Local phone company | – |
| 361-746 | AT&T Mobility | Mobile carrier | – |
| 361-901 | Onvoy | Internet / business phone carrier | 2021 |
| 361-920 | AT&T Mobility | Mobile carrier | – |
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.