Phone numbers in Chatham, Michigan
Chatham has 3 phone prefixes in area code 906.
Biggest holders: Range Telecommunications, Onvoy, Chatham Tel. This is the local calling area (rate center) where those prefixes were first assigned.
- Internet / business phone carrier 33%
- Phone company 67%
Every prefix in Chatham
Search the first six digits of a number in this list. If it's here, the number started in Chatham with the carrier shown. If it isn't, check the Michigan page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 906-381 | Range Telecommunications | Phone company | – |
| 906-435 | Onvoy | Internet / business phone carrier | – |
| 906-439 | Chatham Tel | 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.