Phone numbers in Harbor Springs, Michigan
Harbor Springs has 7 phone prefixes in area code 231.
Biggest holders: AT&T (local phone), CenturyLink / Lumen, Teleport Communications America. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 43%
- Internet / business phone carrier 43%
- Paging service 14%
Every prefix in Harbor Springs
Search the first six digits of a number in this list. If it's here, the number started in Harbor Springs with the carrier shown. If it isn't, check the Michigan page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 231-221 | CenturyLink / Lumen | Local phone company | 2015 |
| 231-242 | AT&T (local phone) | Local phone company | – |
| 231-324 | Teleport Communications America | Internet / business phone carrier | 2021 |
| 231-412 | Bandwidth | Internet / business phone carrier | 2010 |
| 231-438 | Onvoy | Internet / business phone carrier | 2023 |
| 231-526 | AT&T (local phone) | Local phone company | – |
| 231-596 | Spok | Paging service | – |
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.