Wayne County · Michigan
Detroit, MI area codes and time zone
Quick answer
Detroit is served by area codes 231, 248, 313, 517, 586, 734, 947, keeps EST time (GMT-5), and sits in county FIPS 26163.
- Area codes
- 231 · 248 · 313 · 517 · 586 · 734 · 947Within 25 miles of the city centre
- Time zone
- ESTAmerica/Detroit
- UTC offset
- GMT-5EDT in summer (UTCGMT-4)
- County FIPS
- 26163Wayne County
Dialling from and to Detroit
What this means when you pick up the phone.
Because more than one code covers this area, ten-digit dialling applies for local calls: area code plus number, every time. From abroad, dial +1 then the ten digits.
How Detroit came to have several area codes
Why one city can carry several codes.
Area codes are assigned to geography, then exhausted as demand grows. Detroit — population about 633k — is covered by codes 231, 248, 313, 517, 586, 734, 947, drawn from within 25 miles of the city centre. Because these 7 codes serve the same footprint, they are overlays: the number pool ran low and a new code was layered on top rather than splitting the city apart. All ten digits are required for every local call.
More Detroit data
Other Detroit datasets on this site.
- Detroit population and income
- Detroit sales tax rate
- Detroit property tax
- Detroit cost of living
- Detroit home values and rent
- Detroit crime rates
- Detroit public schools
- Detroit weather normals
- Detroit commute times
Statewide: Michigan cities · Michigan ZIP codes · Michigan sales tax · Michigan counties