The area code 278 is located in ann arbor, michigan.
Area code 278 is not an active area code for Ann Arbor or Michigan. Ann Arbor phone numbers use area code 734, which serves Washtenaw County and nearby communities in southeast Michigan. The 734 area code was created in 1997 when it split from 313 to handle growing demand. Ann Arbor is a major hub thanks to the University of Michigan, the Huron River, and a tech and research scene that draws talent from across the state.
Area code 734 covers Ann Arbor and nearby cities such as:
You may also see nearby Michigan area codes like 313 (Detroit), 248/947 (Oakland County), 517 (Lansing area), 586 (Macomb County), and 810 (Flint area). If you come across “area code 278” tied to Ann Arbor, it’s likely a misprint or caller ID spoofing. Another common mix‑up: +27 is the country code for South Africa, so numbers starting with “+278…” are South African mobile numbers, not a Michigan area code.
“Population (Ann Arbor, 2020): 123,851.” — U.S. Census Bureau
For local flavor, Ann Arbor is home to Michigan Stadium (“The Big House”), one of the world’s largest sports venues and the largest in the United States. Bottom line: for Ann Arbor phone numbers, look for 734, not 278. This helps when checking unknown calls, setting up local service, or searching for Michigan phone number information.