Phone numbers in Cadillac, Michigan
Cadillac has 21 phone prefixes in area code 231.
Biggest holders: T-Mobile (including Sprint), AT&T Mobility, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 48%
- Local phone company 14%
- Internet / business phone carrier 24%
- Paging service 10%
- Phone company 5%
Every prefix in Cadillac
Search the first six digits of a number in this list. If it's here, the number started in Cadillac with the carrier shown. If it isn't, check the Michigan page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 231-253 | T-Mobile (including Sprint) | Mobile carrier | 2018 |
| 231-281 | AT&T Mobility | Mobile carrier | 2020 |
| 231-285 | T-Mobile (including Sprint) | Mobile carrier | 2020 |
| 231-306 | Interactive Services Network | Internet / business phone carrier | – |
| 231-396 | Onvoy | Internet / business phone carrier | 2021 |
| 231-429 | Verizon Wireless | Mobile carrier | 2002 |
| 231-444 | Onvoy | Internet / business phone carrier | 2015 |
| 231-468 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 231-514 | American Messaging Services | Paging service | – |
| 231-577 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 231-593 | Spok | Paging service | – |
| 231-775 | AT&T (local phone) | Local phone company | – |
| 231-779 | AT&T (local phone) | Local phone company | – |
| 231-842 | 123.NET | Phone company | 2002 |
| 231-846 | T-Mobile (including Sprint) | Mobile carrier | – |
| 231-876 | AT&T (local phone) | Local phone company | – |
| 231-878 | Verizon Wireless | Mobile carrier | 2002 |
| 231-884 | AT&T Mobility | Mobile carrier | – |
| 231-920 | AT&T Mobility | Mobile carrier | – |
| 231-942 | Verizon Wireless | Mobile carrier | 2001 |
| 231-968 | Bandwidth | Internet / business phone carrier | 2021 |
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.