605 Area Code
South Dakota (statewide), South Dakota
Area code 605 is located in South Dakota (statewide), South Dakota. It covers Sioux Falls, Rapid City, and surrounding areas in the Central time zone (UTC-6). Administered by NANPA.
Where is area code 605?
Area code 605 is located in South Dakota (statewide), South Dakota. It covers Sioux Falls, Rapid City, and surrounding areas in the Central time zone (UTC-6).
Cities Covered by Area Code 605
Area code 605 primarily serves the South Dakota (statewide) area of South Dakota. The exact coverage includes Sioux Falls, Rapid City, and Aberdeen, along with surrounding communities and suburbs.
Time Zone
Central Time — UTC-6
Area code 605 operates in the Central Time Zone. When calling 605 numbers from a different time zone, be sure to account for the time difference to reach people during business hours.
About Area Code 605
Area code 605 was introduced in 1954 as a geographic area code serving South Dakota (statewide), South Dakota. 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.