Phone numbers in Ironwood, Michigan
Ironwood has 7 phone prefixes in area code 906.
Biggest holders: Verizon Wireless, Interactive Services Network, AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 57%
- Local phone company 14%
- Internet / business phone carrier 29%
Every prefix in Ironwood
Search the first six digits of a number in this list. If it's here, the number started in Ironwood with the carrier shown. If it isn't, check the Michigan page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 906-285 | Verizon Wireless | Mobile carrier | 2003 |
| 906-307 | Interactive Services Network | Internet / business phone carrier | – |
| 906-336 | Verizon Wireless | Mobile carrier | 2026 |
| 906-364 | AT&T Mobility | Mobile carrier | – |
| 906-675 | Peninsula Fiber Network | Internet / business phone carrier | 2013 |
| 906-767 | T-Mobile (including Sprint) | Mobile carrier | 2018 |
| 906-932 | 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.