Phone numbers in St. George, Utah
St. George has 53 phone prefixes in area code 435.
Biggest holders: CenturyLink / Lumen, T-Mobile (including Sprint), AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 38%
- Local phone company 28%
- Internet / business phone carrier 32%
- Phone company 2%
Every prefix in St. George
Search the first six digits of a number in this list. If it's here, the number started in St. George with the carrier shown. If it isn't, check the Utah page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 435-215 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 435-216 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 435-218 | Onvoy | Internet / business phone carrier | 2013 |
| 435-229 | T-Mobile (including Sprint) | Mobile carrier | – |
| 435-236 | Verizon Wireless | Mobile carrier | 2016 |
| 435-251 | CenturyLink / Lumen | Local phone company | 2003 |
| 435-256 | Onvoy | Internet / business phone carrier | – |
| 435-272 | Bandwidth | Internet / business phone carrier | – |
| 435-275 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 435-288 | AT&T Mobility | Mobile carrier | 2022 |
| 435-301 | Verizon Wireless | Mobile carrier | – |
| 435-313 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 435-319 | T-Mobile (including Sprint) | Mobile carrier | 2011 |
| 435-351 | Onvoy | Internet / business phone carrier | 2023 |
| 435-357 | AT&T Mobility | Mobile carrier | 2023 |
| 435-359 | Onvoy | Internet / business phone carrier | – |
| 435-360 | T-Mobile (including Sprint) | Mobile carrier | 2024 |
| 435-366 | TDS Broadband Service | Internet / business phone carrier | 2025 |
| 435-375 | AT&T Mobility | Mobile carrier | 2018 |
| 435-377 | TDS Broadband Service | Internet / business phone carrier | 2026 |
| 435-414 | T-Mobile (including Sprint) | Mobile carrier | 2011 |
| 435-429 | Bandwidth | Internet / business phone carrier | 2015 |
| 435-467 | South Central Utah Tel. Assn | Phone company | – |
| 435-522 | CenturyLink / Lumen | Local phone company | 2017 |
| 435-523 | Onvoy | Internet / business phone carrier | 2020 |
| 435-525 | T-Mobile (including Sprint) | Mobile carrier | 2011 |
| 435-574 | CenturyLink / Lumen | Local phone company | – |
| 435-599 | Fractel | Internet / business phone carrier | 2021 |
| 435-619 | AT&T Mobility | Mobile carrier | – |
| 435-627 | CenturyLink / Lumen | Local phone company | – |
| 435-628 | CenturyLink / Lumen | Local phone company | – |
| 435-632 | Verizon Wireless | Mobile carrier | – |
| 435-634 | CenturyLink / Lumen | Local phone company | – |
| 435-635 | CenturyLink / Lumen | Local phone company | – |
| 435-652 | CenturyLink / Lumen | Local phone company | – |
| 435-656 | CenturyLink / Lumen | Local phone company | – |
| 435-668 | Verizon Wireless | Mobile carrier | – |
| 435-669 | Verizon Wireless | Mobile carrier | – |
| 435-673 | CenturyLink / Lumen | Local phone company | – |
| 435-674 | CenturyLink / Lumen | Local phone company | – |
| 435-680 | AT&T Mobility | Mobile carrier | – |
| 435-688 | CenturyLink / Lumen | Local phone company | – |
| 435-703 | T-Mobile (including Sprint) | Mobile carrier | – |
| 435-705 | T-Mobile (including Sprint) | Mobile carrier | – |
| 435-767 | Level 3 (Lumen) | Internet / business phone carrier | 2001 |
| 435-772 | CenturyLink / Lumen | Local phone company | – |
| 435-773 | Allstream | Internet / business phone carrier | – |
| 435-817 | AT&T Mobility | Mobile carrier | 2005 |
| 435-862 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 435-879 | CenturyLink / Lumen | Local phone company | – |
| 435-900 | Fractel | Internet / business phone carrier | 2019 |
| 435-922 | Bandwidth | Internet / business phone carrier | 2015 |
| 435-986 | CenturyLink / Lumen | Local phone company | – |
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.