Phone numbers in Sullivan, Missouri
Sullivan has 3 phone prefixes in area code 573.
Biggest holders: Fidelity Telephone, T-Mobile (including Sprint). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 33%
- Phone company 67%
Every prefix in Sullivan
Search the first six digits of a number in this list. If it's here, the number started in Sullivan with the carrier shown. If it isn't, check the Missouri page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 573-468 | Fidelity Telephone | Phone company | – |
| 573-617 | T-Mobile (including Sprint) | Mobile carrier | 2020 |
| 573-860 | Fidelity Telephone | Phone company | – |
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.