Area Code 605: Sioux Falls, South Dakota
605 is a telephone area code serving South Dakota, including Sioux Falls, Rapid City. It is part of the North American Numbering Plan and is dialed with the country code +1.
Numbers beginning with 605 are located in South Dakota, United States (NANP region: Statewide). The code covers Sioux Falls, Rapid City.
How to Dial Area Code 605
| Calling from | What to dial |
|---|---|
| Anywhere in the US or Canada | 1 605 XXX-XXXX (10-digit dialing: 605 + 7-digit number) |
| Local call inside the same area code | 7-digit number in most areas; 10 digits where an overlay code is active |
| From the UK or Europe | 00 1 605 XXX XXXX |
| From Australia | 0011 1 605 XXX XXXX |
| From a mobile phone anywhere | +1 605 XXX XXXX |
Whatever country you are calling from, the + symbol replaces the exit code. Save the contact as +1 605 XXXXXXX and it will dial correctly from any phone in the world.
Time Zone for Area Code 605
Calls to a 605 number ring in the America/Chicago time zone, standard offset UTC-06:00. Daylight saving time applies here, so the offset moves forward one hour from March to November.
Note: the western half of the state uses Mountain time, one hour behind.
Cities and Communities Served by 605
The following places fall inside the 605 calling area:
Other Area Codes in South Dakota
These codes also serve South Dakota. Area codes are assigned by the North American Numbering Plan Administration (NANPA).
| Area Code | Cities / Coverage |
|---|
See all 1 area codes in South Dakota →
Frequently Asked Questions
Where is area code 605?
Area code 605 is in South Dakota, United States. It covers Sioux Falls, Rapid City.
What time zone is area code 605 in?
Area code 605 rings in the America/Chicago time zone (UTC-06:00 standard).
Do I need to dial 1 before area code 605?
Yes, for a long-distance call inside the US and Canada you dial 1 first, then 605, then the seven-digit number. The 1 is the North American long-distance trunk prefix — it is not the country code. From outside North America you dial your exit code then 1 then 605.
Is area code 605 toll-free?
No. 605 is a standard geographic area code, so normal long-distance rates apply unless your plan includes them. Toll-free NANP codes are 800, 833, 844, 855, 866, 877 and 888.