605 Area Code

The 605 area code is a telephone area code in the North American Numbering Plan (NANP), serving the entire state of South Dakota, USA. It was established in 1947 as one of the original NANP codes and remains unique as the sole area code for the state.

Understanding the 605 Area Code

The 605 area code covers all of South Dakota. Unlike many states that have multiple or overlaid area codes due to growth, South Dakota continues to operate under a single code. This makes 605 strongly associated with state identity, appearing frequently in local branding and culture.

605 Area Code Map and Location

The 605 area code map shows coverage across the entire state of South Dakota, which is located in the Midwestern United States. South Dakota falls within the Central Time Zone (CT) in the eastern part of the state and the Mountain Time Zone (MT) in the western regions.

Major Cities and Regions in the 605 Area Code

  • Sioux Falls (largest city)
  • Rapid City
  • Pierre (state capital)
  • Aberdeen
  • Brookings
  • Watertown
  • Mitchell
  • Yankton

ZIP Codes Covered by the 605 Area Code

The 605 area code covers all South Dakota ZIP codes, including:

  • 57104 - Sioux Falls
  • 57701 - Rapid City
  • 57501 - Pierre
  • 57401 - Aberdeen
  • 57006 - Brookings
  • 57201 - Watertown
  • 57301 - Mitchell
  • 57078 - Yankton

Time Zone

The 605 area code spans two time zones:

  • Central Time Zone (CT) - Eastern South Dakota (UTC-6 / UTC-5 DST)
  • Mountain Time Zone (MT) - Western South Dakota (UTC-7 / UTC-6 DST)

Dialing, Phone & Service Details

  • Overlay Codes: None (605 remains the only code)
  • Local dialing: 10-digit dialing is required statewide
  • Long-distance within the USA: Dial 1 + 605 + 7-digit number
  • International calls: Dial your country�s exit code + 1 + 605 + number
  • Services: Mobile, landline, VoIP, residential and business telecommunications

What area code is 605? / Where's area code 605?

What area code is 605? � It is the single telephone area code for the entire state of South Dakota.

Where's area code 605? � The 605 area code is located in South Dakota, USA, serving all cities, towns, and rural areas statewide.

Frequently Asked Questions (FAQ) about 605 Area Code

What is the 605 area code?

The 605 area code serves the entire state of South Dakota.

When was the 605 area code created?

It was created in 1947 as one of the original NANP codes.

Where is area code 605 located?

It covers all of South Dakota, including Sioux Falls, Rapid City, Pierre, and Aberdeen.

Does 605 have an overlay?

No, South Dakota continues to operate under a single statewide code.

What time zone is 605 in?

It spans both the Central Time Zone and the Mountain Time Zone, depending on location.

605 Area Code