🇺🇸 605 area code
Area code 605 covers Rapid City, Sioux Falls, Aberdeen and Spearfish and the surrounding area in South Dakota. Enter a 605 number below for a free check before you call back.
- Location: Rapid City, South Dakota
- Time zone: Central and Mountain (UTC−7 / UTC−6)
- In service since 1947
Nummer abfragen
Gültigkeit, Anbieter, Leitungstyp und Region im ersten Durchgang.
Area code 605 at a glance
- Area code
- 605
- Location
- South Dakota, United States
- Main cities
- Rapid City, Sioux Falls, Aberdeen, Spearfish, Watertown, Brookings
- Time zone
- Central and Mountain (UTC−7 / UTC−6)
- Local time now
- —
- In service since
- 1947
- Local calls
- Dial 10 digits
- Number format
- (605) 555-0123
- From abroad
- +1 605 555 0123
Cities in area code 605
- Rapid City
- Sioux Falls
- Aberdeen
- Spearfish
- Watertown
- Brookings
- Pierre
- Yankton
- Chamberlain
- Huron
Is a 605 call a scam?
An area code tells you where a number was first assigned, not where the caller is. Mobile numbers keep their area code when people move, and internet (VoIP) numbers can be picked in any area code — so a 605 number can be calling from anywhere.
Robocallers exploit that with "neighbor spoofing": showing a 605 number to people in South Dakota because a local-looking call is more likely to be answered. If a 605 call claims to be your bank, the IRS or a delivery company, hang up and call the official number yourself.
About area code 605
605 is one of the original North American area codes, created in 1947 when AT&T and the Bell System first divided the continent into numbering plan areas.
The area straddles a time-zone line (Central and Mountain), so a 605 caller may be an hour ahead of or behind the next town.
FAQ
Area code 605 questions
Sources: NANPA NPA database (11/04/2026) and Google libphonenumber. Area codes show where a number was assigned, not where its owner is today.
Where is area code 605?
Area code 605 is in South Dakota, United States. It covers Rapid City, Sioux Falls, Aberdeen, Spearfish, Watertown and Brookings.
What time zone is area code 605?
605 is in the Central and Mountain (UTC−7 / UTC−6) time zone, and observes daylight saving time.
When did area code 605 start?
605 entered service in 1947.
How do I find out who called me from 605?
Enter the full number in the lookup at the top of this page. The free check confirms whether the number is valid and shows its carrier, line type and region; a full report adds owner and public-web records where they are available.
Why am I getting calls from area code 605?
If you live in or near South Dakota, they may be genuinely local — or robocalls spoofing a local-looking number. Unknown 605 callers who will not leave a message are best looked up before you call back.
Got a call from 605?
Run the free check first — validity, carrier, line type and region — and unlock the full report only if you need it.