Phone numbers in Red Bluff, California
Red Bluff has 15 phone prefixes in area codes 530, 837.
Biggest holders: AT&T (local phone), T-Mobile (including Sprint), Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 27%
- Local phone company 27%
- Internet / business phone carrier 33%
- Phone company 13%
Every prefix in Red Bluff
Search the first six digits of a number in this list. If it's here, the number started in Red Bluff with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 530-366 | AT&T (local phone) | Local phone company | – |
| 530-526 | Verizon Wireless | Mobile carrier | – |
| 530-527 | AT&T (local phone) | Local phone company | – |
| 530-528 | AT&T (local phone) | Local phone company | – |
| 530-529 | AT&T (local phone) | Local phone company | – |
| 530-567 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 530-602 | Onvoy | Internet / business phone carrier | – |
| 530-690 | Charter / Spectrum | Internet / business phone carrier | – |
| 530-707 | Exiant Communications | Phone company | 2026 |
| 530-727 | Charter / Spectrum | Internet / business phone carrier | – |
| 530-736 | AT&T Mobility | Mobile carrier | 2001 |
| 530-737 | IP Horizon | Internet / business phone carrier | – |
| 530-765 | Onvoy | Internet / business phone carrier | 2024 |
| 530-840 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 837-222 | Opentact | Phone company | 2026 |
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.