Phone numbers in Winona, Missouri
Winona has 3 phone prefixes in area code 573.
Biggest holders: Onvoy, Brightspeed Of East Missouri, AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 33%
- Local phone company 33%
- Internet / business phone carrier 33%
Every prefix in Winona
Search the first six digits of a number in this list. If it's here, the number started in Winona with the carrier shown. If it isn't, check the Missouri page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 573-307 | Onvoy | Internet / business phone carrier | – |
| 573-325 | Brightspeed Of East Missouri | Local phone company | – |
| 573-604 | AT&T Mobility | Mobile carrier | 2004 |
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.