Phone numbers in Addison, Michigan
Addison has 5 phone prefixes in area code 517.
Biggest holders: AT&T Mobility, Frontier, Interactive Services Network. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 20%
- Local phone company 20%
- Internet / business phone carrier 40%
- Phone company 20%
Every prefix in Addison
Search the first six digits of a number in this list. If it's here, the number started in Addison with the carrier shown. If it isn't, check the Michigan page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 517-252 | AT&T Mobility | Mobile carrier | – |
| 517-547 | Frontier | Local phone company | – |
| 517-659 | Interactive Services Network | Internet / business phone carrier | 2002 |
| 517-733 | TON80 Communications | Internet / business phone carrier | 2022 |
| 517-921 | Acd Telecom | Phone company | 2001 |
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.