605 Area Code
South Dakota, USA
Local time now · Central Time
2:45 AM
Area code 605 is in South Dakota, USA, serving Sioux Falls, Rapid City, Aberdeen and Brookings. It uses Central Time and Mountain Time — the time there now is 2:45 AM. In service since 1947.
| Area code | 605 |
|---|---|
| Location | South Dakota, USA |
| Major cities | Sioux Falls, Rapid City, Aberdeen, Brookings, Watertown, Mitchell, Yankton, Huron |
| Time zone | Central Time / Mountain Time |
| In service since | 1947 |
| Dialing | 1+10 digit permissible at service provider discretion. |
Time zone converterAll area codes
Frequently asked questions
Where is area code 605?
South Dakota, USA — including Sioux Falls, Rapid City, Aberdeen, Brookings and Watertown.
What time zone is area code 605?
Central Time and Mountain Time (the area spans two time zones).
How do I call a 605 number from abroad?
Dial your international access code, then 1 (the country code), then 605 and the 7-digit number — for example +1 605 555 0100. From the UK or India dial 00 1 605 …; from Bangladesh 00 1 605 … .
Is a call from 605 a scam?
Not by itself — 605 is an ordinary geographic area code in South Dakota. Numbers can be spoofed, so be careful with unexpected calls asking for money or personal details.
Sources: North American Numbering Plan Administrator (NANPA) NPA database (10/25/2026); major cities from Wikidata (CC0). An area code shows where a number was first assigned — with number portability and mobile phones, the caller may be anywhere.