Phone numbers in Marble Falls, Texas
Marble Falls has 12 phone prefixes in area code 830.
Biggest holders: T-Mobile (including Sprint), Onvoy, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 50%
- Local phone company 17%
- Internet / business phone carrier 33%
Every prefix in Marble Falls
Search the first six digits of a number in this list. If it's here, the number started in Marble Falls with the carrier shown. If it isn't, check the Texas page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 830-201 | Charter / Spectrum | Internet / business phone carrier | 2007 |
| 830-220 | AT&T Mobility | Mobile carrier | 2002 |
| 830-262 | T-Mobile (including Sprint) | Mobile carrier | 2017 |
| 830-265 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 830-347 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 830-371 | Onvoy | Internet / business phone carrier | 2022 |
| 830-385 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 830-613 | Verizon Wireless | Mobile carrier | 2001 |
| 830-637 | Verizon Wireless | Mobile carrier | 2006 |
| 830-693 | Frontier | Local phone company | – |
| 830-798 | Frontier | Local phone company | – |
| 830-987 | Onvoy | Internet / business phone carrier | 2025 |
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.