Area code 734: where it is and who calls from it
Area code 734 is in Michigan.
Michigan (Ann Arbor, Hell, Monroe, Plymouth, Romulus, Wayne, Ypsilanti, and the southwestern suburbs of Detroit)
| Where | Michigan |
|---|---|
| Time zone | Eastern Time ยท local time |
| In service since | 1997 |
| Overlay | Yes, with 679 |
| Prefixes assigned | 701 of 792 possible (89%) |
Overlay: 734 covers the same area as 679. Overlay areas use 10-digit dialing, so a seven-digit number alone won't connect, and neighbors can have different area codes.
Where 734 numbers started
Every prefix is assigned to a rate center, the local calling area it was set up in. These are the biggest in 734, with how many prefixes each has.
Who holds 734 numbers
- Mobile carrier 26%
- Local phone company 25%
- Internet / business phone carrier 44%
- Paging service 3%
- Phone company 1%
| Carrier | Type | Prefixes | Share |
|---|---|---|---|
| AT&T (local phone) | Local phone company | 161 | 23% |
| Verizon Wireless | Mobile carrier | 71 | 10% |
| T-Mobile (including Sprint) | Mobile carrier | 55 | 8% |
| MCImetro (Verizon Business) | Internet / business phone carrier | 52 | 7% |
| Onvoy | Internet / business phone carrier | 45 | 6% |
| Windstream (PAETEC) | Internet / business phone carrier | 42 | 6% |
| Level 3 (Lumen) | Internet / business phone carrier | 42 | 6% |
| AT&T Mobility | Mobile carrier | 42 | 6% |
| Teleport Communications America | Internet / business phone carrier | 37 | 5% |
| Interactive Services Network | Internet / business phone carrier | 31 | 4% |
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.
States served: Michigan.
Other area codes in Michigan
231 248 269 313 517 586 616 679 810 906 947 989
Got a call from 734?
An area code tells you where a number was first assigned, not where the caller is. People keep their numbers when they move, and scammers can fake any number. If you weren't expecting the call, let it go to voicemail.
If the call shows a 734 number that matches the first six digits of your own, that's often neighbor spoofing. Use the box above to check the full number.
Area code facts from the NANPA area code database (updated 10/06/2026); prefixes and carriers from NANPA's central office code records (updated 2026-10-10). Place description adapted from Wikipedia, CC BY-SA 4.0.