Phone numbers in Mt. Shasta, California
Mt. Shasta has 8 phone prefixes in area code 530.
Biggest holders: AT&T (local phone), Level 3 (Lumen), UScellular. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 38%
- Local phone company 25%
- Internet / business phone carrier 38%
Every prefix in Mt. Shasta
Search the first six digits of a number in this list. If it's here, the number started in Mt. Shasta with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 530-239 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 530-261 | UScellular | Mobile carrier | – |
| 530-568 | IP Horizon | Internet / business phone carrier | – |
| 530-697 | Telnyx | Internet / business phone carrier | 2021 |
| 530-859 | AT&T Mobility | Mobile carrier | 2001 |
| 530-918 | AT&T (local phone) | Local phone company | – |
| 530-925 | Verizon Wireless | Mobile carrier | – |
| 530-926 | AT&T (local phone) | 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.