Phone numbers in Alturas, California
Alturas has 3 phone prefixes in area code 530.
Biggest holders: Frontier, UScellular, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 67%
- Local phone company 33%
Every prefix in Alturas
Search the first six digits of a number in this list. If it's here, the number started in Alturas with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 530-233 | Frontier | Local phone company | – |
| 530-640 | UScellular | Mobile carrier | – |
| 530-708 | Verizon Wireless | Mobile carrier | 2004 |
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.