Phone numbers in Sanger, California
Sanger has 8 phone prefixes in area codes 357, 559.
Biggest holders: Onvoy, Frontier, Level 3 (Lumen). This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 25%
- Internet / business phone carrier 62%
- Phone company 12%
Every prefix in Sanger
Search the first six digits of a number in this list. If it's here, the number started in Sanger with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 357-666 | Onvoy | Internet / business phone carrier | 2026 |
| 559-399 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 559-524 | Hd Carrier | Internet / business phone carrier | – |
| 559-546 | Wide Voice | Phone company | 2010 |
| 559-875 | Frontier | Local phone company | – |
| 559-876 | Frontier | Local phone company | – |
| 559-902 | Onvoy | Internet / business phone carrier | 2021 |
| 559-990 | Skyetel | Internet / business phone carrier | 2021 |
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.