Phone numbers in Mammoth Lakes, California
Mammoth Lakes has 7 phone prefixes in area code 760.
Biggest holders: Onvoy, Frontier, 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 43%
Every prefix in Mammoth Lakes
Search the first six digits of a number in this list. If it's here, the number started in Mammoth Lakes with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 760-210 | Verizon Wireless | Mobile carrier | 2023 |
| 760-709 | Level 3 (Lumen) | Internet / business phone carrier | 2001 |
| 760-914 | AT&T Mobility | Mobile carrier | 2003 |
| 760-923 | Onvoy | Internet / business phone carrier | – |
| 760-924 | Frontier | Local phone company | – |
| 760-934 | Frontier | Local phone company | – |
| 760-965 | Onvoy | Internet / business phone carrier | 2001 |
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.