Phone numbers in Dexter, Michigan
Dexter has 16 phone prefixes in area code 734.
Biggest holders: Level 3 (Lumen), Onvoy, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 12%
- Local phone company 12%
- Internet / business phone carrier 75%
Every prefix in Dexter
Search the first six digits of a number in this list. If it's here, the number started in Dexter with the carrier shown. If it isn't, check the Michigan page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 734-201 | Onvoy | Internet / business phone carrier | 2016 |
| 734-204 | Verizon Wireless | Mobile carrier | 2013 |
| 734-253 | Comcast | Internet / business phone carrier | – |
| 734-268 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 734-378 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 734-388 | Level 3 (Lumen) | Internet / business phone carrier | 2005 |
| 734-408 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 734-424 | AT&T (local phone) | Local phone company | – |
| 734-426 | AT&T (local phone) | Local phone company | – |
| 734-580 | Comcast | Internet / business phone carrier | 2012 |
| 734-594 | Verizon Wireless | Mobile carrier | 2013 |
| 734-724 | Onvoy | Internet / business phone carrier | 2018 |
| 734-726 | Level 3 (Lumen) | Internet / business phone carrier | 2006 |
| 734-792 | Teleport Communications America | Internet / business phone carrier | – |
| 734-808 | Peerless Network Of Michigan | Internet / business phone carrier | 2014 |
| 734-932 | TON80 Communications | Internet / business phone carrier | 2022 |
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.