Phone numbers in Seguin, Texas
Seguin has 24 phone prefixes in area code 830.
Biggest holders: AT&T (local phone), AT&T Mobility, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 29%
- Local phone company 29%
- Internet / business phone carrier 33%
- Phone company 8%
Every prefix in Seguin
Search the first six digits of a number in this list. If it's here, the number started in Seguin with the carrier shown. If it isn't, check the Texas page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 830-235 | Tpx Communications | Internet / business phone carrier | 2022 |
| 830-243 | AT&T Mobility | Mobile carrier | 2013 |
| 830-272 | Exiant Communications | Phone company | 2018 |
| 830-303 | AT&T (local phone) | Local phone company | – |
| 830-305 | AT&T Mobility | Mobile carrier | – |
| 830-340 | Telnyx | Internet / business phone carrier | 2021 |
| 830-372 | AT&T (local phone) | Local phone company | – |
| 830-379 | AT&T (local phone) | Local phone company | – |
| 830-386 | AT&T (local phone) | Local phone company | – |
| 830-390 | Commio | Internet / business phone carrier | 2022 |
| 830-401 | AT&T (local phone) | Local phone company | – |
| 830-406 | AT&T Mobility | Mobile carrier | 2015 |
| 830-433 | Charter / Spectrum | Internet / business phone carrier | – |
| 830-463 | Teleport Communications America | Internet / business phone carrier | 2001 |
| 830-475 | Verizon Wireless | Mobile carrier | 2022 |
| 830-491 | Verizon Wireless | Mobile carrier | 2001 |
| 830-547 | Matrix Telecom, Llc. S/i/i Tnci | Internet / business phone carrier | – |
| 830-549 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 830-556 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 830-557 | AT&T (local phone) | Local phone company | – |
| 830-560 | AT&T (local phone) | Local phone company | – |
| 830-666 | Foremost Telecommunications | Phone company | 2010 |
| 830-800 | Onvoy | Internet / business phone carrier | 2017 |
| 830-865 | AT&T Mobility | Mobile carrier | 2002 |
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.