Phone numbers in Chesterfield, Indiana
Chesterfield has 5 phone prefixes in area code 765.
Biggest holders: Peerless Network Of Indiana, AT&T (local phone), Level 3 (Lumen). This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 20%
- Internet / business phone carrier 80%
Every prefix in Chesterfield
Search the first six digits of a number in this list. If it's here, the number started in Chesterfield with the carrier shown. If it isn't, check the Indiana page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 765-378 | AT&T (local phone) | Local phone company | – |
| 765-387 | Level 3 (Lumen) | Internet / business phone carrier | 2004 |
| 765-699 | Bandwidth | Internet / business phone carrier | 2021 |
| 765-888 | Peerless Network Of Indiana | Internet / business phone carrier | 2016 |
| 765-999 | Peerless Network Of Indiana | Internet / business phone carrier | 2012 |
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.