| Area Code | 734 |
| State | Michigan |
| Current Time in Area Code 734 | 734> EDT |
| Timezone | Eastern Daylight Time |
| Regional Market Area | Metro Detroit |
| Metro Area(s) | Ann Arbor, MI Monroe, MI |
| Population (2020) | 527067 |
| Adjacent Area Codes | 226,248,313,419,517,519,548,567,810,947 |
| Monroe County |
| Washtenaw County |