Phone numbers in Coldwater, Michigan
Coldwater has 14 phone prefixes in area code 517.
Biggest holders: Verizon Wireless, Frontier, AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 36%
- Local phone company 14%
- Internet / business phone carrier 29%
- Paging service 7%
- Phone company 14%
Every prefix in Coldwater
Search the first six digits of a number in this list. If it's here, the number started in Coldwater with the carrier shown. If it isn't, check the Michigan page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 517-227 | Verizon Wireless | Mobile carrier | 2003 |
| 517-278 | Frontier | Local phone company | – |
| 517-279 | Frontier | Local phone company | – |
| 517-309 | Spok | Paging service | – |
| 517-317 | AT&T Mobility | Mobile carrier | – |
| 517-462 | Verizon Wireless | Mobile carrier | 2004 |
| 517-617 | AT&T Mobility | Mobile carrier | – |
| 517-677 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 517-736 | 123.NET | Phone company | 2001 |
| 517-746 | TON80 Communications | Internet / business phone carrier | 2022 |
| 517-753 | Interactive Services Network | Internet / business phone carrier | 2001 |
| 517-781 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 517-924 | Charter / Spectrum | Internet / business phone carrier | 2007 |
| 517-933 | Acd Telecom | 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.