Phone numbers in Ione, California
Ione has 6 phone prefixes in area code 209.
Biggest holders: Bandwidth, AT&T (local phone), MCImetro (Verizon Business). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 17%
- Local phone company 17%
- Internet / business phone carrier 67%
Every prefix in Ione
Search the first six digits of a number in this list. If it's here, the number started in Ione with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 209-274 | AT&T (local phone) | Local phone company | – |
| 209-332 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 209-457 | Bandwidth | Internet / business phone carrier | 2015 |
| 209-781 | Bandwidth | Internet / business phone carrier | – |
| 209-790 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 209-964 | AT&T Mobility | Mobile carrier | – |
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.