Phone numbers in Monticello, Indiana
Monticello has 6 phone prefixes in area code 574.
Biggest holders: T-Mobile (including Sprint), Pulaski-white Rural Telephone Cooperative, AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 67%
- Local phone company 33%
Every prefix in Monticello
Search the first six digits of a number in this list. If it's here, the number started in Monticello with the carrier shown. If it isn't, check the Indiana page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 574-240 | Pulaski-white Rural Telephone Cooperative | Local phone company | 2013 |
| 574-297 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 574-581 | AT&T Mobility | Mobile carrier | – |
| 574-583 | Brightspeed Of Indiana | Local phone company | – |
| 574-808 | T-Mobile (including Sprint) | Mobile carrier | 2004 |
| 574-870 | Verizon Wireless | Mobile carrier | 2002 |
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.