Phone numbers in Delphi, Indiana
Delphi has 5 phone prefixes in area code 765.
Biggest holders: Verizon Wireless, Onvoy, Frontier. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 40%
- Local phone company 20%
- Internet / business phone carrier 40%
Every prefix in Delphi
Search the first six digits of a number in this list. If it's here, the number started in Delphi with the carrier shown. If it isn't, check the Indiana page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 765-201 | Verizon Wireless | Mobile carrier | – |
| 765-202 | Onvoy | Internet / business phone carrier | – |
| 765-564 | Frontier | Local phone company | – |
| 765-822 | AT&T Mobility | Mobile carrier | 2004 |
| 765-837 | TON80 Communications | Internet / business phone carrier | 2022 |
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.