Phone numbers in Osceola, Indiana
Osceola has 13 phone prefixes in area code 574.
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 31%
- Local phone company 38%
- Internet / business phone carrier 23%
- Phone company 8%
Every prefix in Osceola
Search the first six digits of a number in this list. If it's here, the number started in Osceola with the carrier shown. If it isn't, check the Indiana page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 574-329 | T-Mobile (including Sprint) | Mobile carrier | – |
| 574-396 | AT&T (local phone) | Local phone company | 2023 |
| 574-444 | Onvoy | Internet / business phone carrier | 2015 |
| 574-607 | T-Mobile (including Sprint) | Mobile carrier | – |
| 574-621 | T-Mobile (including Sprint) | Mobile carrier | – |
| 574-651 | AT&T (local phone) | Local phone company | – |
| 574-667 | Fractel | Internet / business phone carrier | 2021 |
| 574-674 | AT&T (local phone) | Local phone company | – |
| 574-675 | AT&T (local phone) | Local phone company | – |
| 574-679 | AT&T (local phone) | Local phone company | – |
| 574-707 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 574-742 | AT&T Enterprises | Phone company | 2006 |
| 574-777 | Onvoy | Internet / business phone carrier | 2017 |
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.