Area Code Box

Area code 605

Where is area code 605?

Sioux Falls, Rapid City and Aberdeen, South Dakota

Local time: … (Mountain Time)

StateSouth Dakota
CountryUnited States
Main citiesSioux Falls, Rapid City and Aberdeen
Time zonesMountain Time, Central Time
Overlay area codesNone
In service since1947
Assigned prefixes745
Dialing format(605) XXX-XXXX · +1 605 XXX XXXX from abroad

Look up a 605 number

Enter a 3-digit area code or a full 10-digit number.

Cities and towns in area code 605

Listed by how many phone prefixes (the 3 digits after the area code) are assigned to each place in 605.

Phone companies in area code 605

The carriers that hold the most 605 prefixes. People can move their number to another carrier, so this shows who first issued a number, not who serves it today.

PrefixesCarrier
104Qwest (Lumen)
100Verizon Wireless
81New Cingular Wireless PCS (AT&T)
34Midcontinent Communications.
32Bluepeak
30Venture Communications Cooperative
28Interstate Telecom Coop
27Golden West Telecomm

All 745 prefixes in area code 605

Pick the 3 digits after the area code to see that prefix’s city and carrier.

Questions

Where is area code 605?
Area code 605 is in South Dakota. It serves Sioux Falls, Rapid City, Aberdeen, Spearfish and Watertown and 266 other cities and towns.
What time zone is area code 605 in?
Area code 605 uses Mountain Time and Central Time. Parts of the area are in different zones, so check the city.
Is a call from area code 605 a scam?
The area code alone doesn’t tell you. Most calls from 605 are ordinary local calls, but scammers can fake (“spoof”) any number. If you don’t recognize a 605 number, let it go to voicemail.
When did area code 605 start?
605 went into service in 1947.
Can a 605 number be outside South Dakota?
Yes. People keep their numbers when they move and when they switch to mobile or internet phone services, so a 605 caller can be anywhere.