313 Area Code
Detroit, Michigan
Area code 313 is located in Detroit, Michigan. It covers Detroit, Dearborn, and surrounding areas in the Eastern time zone (UTC-5). Administered by NANPA.
Where is area code 313?
Area code 313 is located in Detroit, Michigan. It covers Detroit, Dearborn, and surrounding areas in the Eastern time zone (UTC-5).
Cities Covered by Area Code 313
Area code 313 primarily serves the Detroit area of Michigan. The exact coverage includes Detroit, Dearborn, and Hamtramck, along with surrounding communities and suburbs.
Time Zone
Eastern Time — UTC-5
Area code 313 operates in the Eastern Time Zone. When calling 313 numbers from a different time zone, be sure to account for the time difference to reach people during business hours.
About Area Code 313
Area code 313 was introduced in 1947 as a geographic area code serving Detroit, Michigan. It remains the primary area code for this region. Area codes are administered by NANPA (North American Numbering Plan Administration), the organization responsible for managing phone number resources in the US and Canada.