Phone numbers in Frankfort, Michigan
Frankfort has 7 phone prefixes in area code 231.
Biggest holders: Peerless Network Of Michigan, Hd Carrier, Interactive Services Network. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 14%
- Internet / business phone carrier 43%
- Paging service 14%
- Phone company 29%
Every prefix in Frankfort
Search the first six digits of a number in this list. If it's here, the number started in Frankfort with the carrier shown. If it isn't, check the Michigan page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 231-216 | Peerless Network Of Michigan | Internet / business phone carrier | 2015 |
| 231-293 | Hd Carrier | Internet / business phone carrier | 2021 |
| 231-312 | Interactive Services Network | Internet / business phone carrier | – |
| 231-352 | AT&T (local phone) | Local phone company | – |
| 231-399 | Acd Telecom | Phone company | 2005 |
| 231-608 | Spok | Paging service | – |
| 231-686 | 123.NET | Phone company | 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.