Phone numbers in Mexico, Missouri
Mexico has 10 phone prefixes in area code 573.
Biggest holders: AT&T (local phone), Onvoy, AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 20%
- Local phone company 30%
- Internet / business phone carrier 40%
- Phone company 10%
Every prefix in Mexico
Search the first six digits of a number in this list. If it's here, the number started in Mexico with the carrier shown. If it isn't, check the Missouri page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 573-253 | AT&T Mobility | Mobile carrier | 2001 |
| 573-473 | AT&T (local phone) | Local phone company | – |
| 573-567 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 573-581 | AT&T (local phone) | Local phone company | – |
| 573-582 | AT&T (local phone) | Local phone company | – |
| 573-591 | Chariton Valley Communications | Phone company | 2014 |
| 573-721 | UScellular | Mobile carrier | 2001 |
| 573-936 | Onvoy | Internet / business phone carrier | 2021 |
| 573-975 | Peerless Network Of Missouri | Internet / business phone carrier | 2013 |
| 573-991 | Onvoy | Internet / business phone carrier | 2024 |
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.