Phone numbers in Middletown, California
Middletown has 5 phone prefixes in area codes 369, 707.
Biggest holders: T-Mobile (including Sprint), UScellular, Peerless Network Of California. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 40%
- Local phone company 20%
- Internet / business phone carrier 40%
Every prefix in Middletown
Search the first six digits of a number in this list. If it's here, the number started in Middletown with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 369-242 | T-Mobile (including Sprint) | Mobile carrier | 2026 |
| 707-355 | UScellular | Mobile carrier | – |
| 707-802 | Peerless Network Of California | Internet / business phone carrier | 2019 |
| 707-809 | Onvoy | Internet / business phone carrier | – |
| 707-987 | 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.