Phone numbers in Warsaw, Indiana
Warsaw has 13 phone prefixes in area code 574.
Biggest holders: Brightspeed Of Indiana, 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 46%
- Internet / business phone carrier 23%
Every prefix in Warsaw
Search the first six digits of a number in this list. If it's here, the number started in Warsaw with the carrier shown. If it isn't, check the Indiana page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 574-265 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 574-267 | Brightspeed Of Indiana | Local phone company | – |
| 574-268 | Brightspeed Of Indiana | Local phone company | – |
| 574-269 | Brightspeed Of Indiana | Local phone company | – |
| 574-306 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 574-371 | Brightspeed Of Indiana | Local phone company | – |
| 574-372 | Brightspeed Of Indiana | Local phone company | – |
| 574-373 | Brightspeed Of Indiana | Local phone company | 2016 |
| 574-376 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 574-385 | Onvoy | Internet / business phone carrier | – |
| 574-394 | Onvoy | Internet / business phone carrier | 2024 |
| 574-549 | AT&T Mobility | Mobile carrier | – |
| 574-551 | 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.