Area Code 605

Sioux Falls, South Dakota · CST/CDT (UTC-6) · United States

Area Code
605
City
Sioux Falls, SD
Time Zone
CST/CDT
UTC Offset
UTC-6 / UTC-5 DST
DST
Observed
Introduced
1947

Where Is Area Code 605?

Entire state of South Dakota

Covers all of South Dakota. Mount Rushmore, Badlands, Black Hills.

Major Cities & Neighborhoods
Sioux FallsRapid CityAberdeenPierre

Time Zone for Area Code 605

Standard Time
CST (UTC-6)
Daylight Time
CDT (UTC-5)
DST 2026 Start
March 8, 2026
DST 2026 End
November 1, 2026
Country
United States
IANA Zone
America/Chicago

Frequently Asked Questions

Where is area code 605?

Area code 605 is located in Sioux Falls, South Dakota (United States). It covers Entire state of South Dakota.

What time zone is area code 605 in?

Area code 605 (Sioux Falls, South Dakota) is in the CST/CDT time zone. Standard time is UTC-6 and UTC-5 during Daylight Saving Time.

Is area code 605 a scam?

Area code 605 is a legitimate NANPA-assigned code serving Sioux Falls, South Dakota. However, scammers can spoof any area code. If you receive an unexpected call from (605), verify the caller before sharing personal information.

What time is it in area code 605 right now?

Area code 605 follows CST/CDT (UTC-6). See the live clock at whattime.city/minneapolis/ for the exact current time in Sioux Falls.

When was area code 605 introduced?

Area code 605 was introduced in 1947. Covers all of South Dakota. Mount Rushmore, Badlands, Black Hills.