Phone numbers in Fremont, Michigan
Fremont has 9 phone prefixes in area code 231.
Biggest holders: AT&T (local phone), Bandwidth, Level 3 (Lumen). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 11%
- Local phone company 22%
- Internet / business phone carrier 44%
- Paging service 11%
- Phone company 11%
Every prefix in Fremont
Search the first six digits of a number in this list. If it's here, the number started in Fremont with the carrier shown. If it isn't, check the Michigan page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 231-224 | Bandwidth | Internet / business phone carrier | – |
| 231-225 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 231-296 | Charter / Spectrum | Internet / business phone carrier | 2021 |
| 231-335 | AT&T Mobility | Mobile carrier | – |
| 231-355 | Interactive Services Network | Internet / business phone carrier | – |
| 231-538 | 123.NET | Phone company | 2002 |
| 231-837 | American Messaging Services | Paging service | – |
| 231-924 | AT&T (local phone) | Local phone company | – |
| 231-928 | AT&T (local phone) | Local phone company | – |
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.