Phone numbers in Chowchilla, California
Chowchilla has 9 phone prefixes in area code 559.
Biggest holders: Onvoy, Bandwidth, AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 22%
- Local phone company 11%
- Internet / business phone carrier 67%
Every prefix in Chowchilla
Search the first six digits of a number in this list. If it's here, the number started in Chowchilla with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 559-201 | Bandwidth | Internet / business phone carrier | – |
| 559-223 | AT&T Mobility | Mobile carrier | – |
| 559-533 | Onvoy | Internet / business phone carrier | – |
| 559-559 | Onvoy | Internet / business phone carrier | 2025 |
| 559-663 | Onvoy | Internet / business phone carrier | – |
| 559-665 | AT&T (local phone) | Local phone company | – |
| 559-715 | TON80 Communications | Internet / business phone carrier | – |
| 559-775 | Comcast | Internet / business phone carrier | 2015 |
| 559-812 | Boost / Virgin Mobile | Mobile carrier | 2022 |
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.