Ann Arbor, MI Area Code

Area code serving Ann Arbor

Ann Arbor sits in Michigan, part of the Midwest region and the Eastern Time zone. Its area code is 734, which covers western Wayne, Washtenaw and Monroe counties in southeast Michigan. 734 has no overlay today, so every Ann Arbor landline and mobile number with a local code starts with 734.

734 has served the area since 1997. If the region runs low on numbers, regulators will most likely add an overlay code on top rather than split the area, which would make 10-digit dialing mandatory.

Code	Area served	In service
734	Western Wayne, Washtenaw and Monroe counties in southeast Michigan	December 13, 1997

Nearby cities sharing this area code

• Livonia
• Westland
• Canton
• Taylor
• Ypsilanti
• Southgate
• Wyandotte
• Romulus
• Lincoln Park
• Monroe
• Plymouth
• Northville
• Belleville

Getting a Ann Arbor phone number

Any new landline, mobile or VoIP number from a local carrier in Ann Arbor gets the 734 area code. Numbers come from the blocks each carrier holds in the area; a number ported in from elsewhere keeps its original area code, so you may also see out-of-state codes locally.

Dialing in Ann Arbor

Ann Arbor is covered by the single area code 734 with no overlay, so some local calls may still connect with seven digits. Dialing all 10 digits (area code + seven-digit number) always works and is the safest habit. From outside the US, dial +1, then the area code and number. See 10-digit dialing and overlay area codes for the background. For every code in Michigan, visit the Michigan area codes page.