Phone numbers in Oakdale, California
Oakdale has 13 phone prefixes in area codes 209, 350.
Biggest holders: T-Mobile (including Sprint), AT&T (local phone), Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 38%
- Local phone company 23%
- Internet / business phone carrier 38%
Every prefix in Oakdale
Search the first six digits of a number in this list. If it's here, the number started in Oakdale with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 209-318 | T-Mobile (including Sprint) | Mobile carrier | 2017 |
| 209-322 | Comcast | Internet / business phone carrier | – |
| 209-493 | Peerless Network Of California | Internet / business phone carrier | 2015 |
| 209-764 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 209-840 | Verizon Wireless | Mobile carrier | – |
| 209-841 | IP Horizon | Internet / business phone carrier | – |
| 209-844 | Onvoy | Internet / business phone carrier | – |
| 209-845 | AT&T (local phone) | Local phone company | – |
| 209-847 | AT&T (local phone) | Local phone company | – |
| 209-848 | AT&T (local phone) | Local phone company | – |
| 209-919 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 350-251 | AT&T Mobility | Mobile carrier | 2025 |
| 350-600 | Onvoy | Internet / business phone carrier | 2023 |
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.