Phone numbers in Rockford, Michigan
Rockford has 10 phone prefixes in area code 616.
Biggest holders: AT&T (local phone), Onvoy, MCImetro (Verizon Business). This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 30%
- Internet / business phone carrier 50%
- Phone company 20%
Every prefix in Rockford
Search the first six digits of a number in this list. If it's here, the number started in Rockford with the carrier shown. If it isn't, check the Michigan page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 616-326 | Onvoy | Internet / business phone carrier | 2011 |
| 616-433 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 616-747 | Onvoy | Internet / business phone carrier | 2016 |
| 616-863 | AT&T (local phone) | Local phone company | – |
| 616-866 | AT&T (local phone) | Local phone company | – |
| 616-867 | Commio | Internet / business phone carrier | 2022 |
| 616-874 | AT&T (local phone) | Local phone company | – |
| 616-883 | Comcast | Internet / business phone carrier | – |
| 616-884 | AT&T Enterprises | Phone company | 2006 |
| 616-951 | First Communications | Phone company | 2008 |
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.