Area Code 605
Sioux Falls, SD — South Dakota
Area code 605 serves Sioux Falls and South Dakota. Get a local 605 number to build instant presence in this market.
Created in 1947 as one of the original North American area codes, 605 covers all of South Dakota. The eastern half, including Sioux Falls, is on Central Time; the western half, including Rapid City, is on Mountain Time.
State
South Dakota (SD)
Capital: Pierre
Time Zone
CT
Central Time (CT)
Region
Midwest
US Census region
Code Type
Geographic
Original area code
Where does area code 605 cover?
Area code 605 serves communities across South Dakota. Cities below represent the primary coverage area per the NANP.
- Sioux Falls
- Rapid City
- Aberdeen
- Brookings
- Watertown
- Pierre
South Dakota phone number landscape
South Dakota's single 605 area code covers Sioux Falls' banking and healthcare hub — home to major credit card processors — and Rapid City's Mount Rushmore tourism and ranching economy.
Number format
When dialing from outside the US, prefix with +1. Within the US, dial all 10 digits including the area code.
History of Area Code 605
Created in 1947 as one of the original North American area codes, 605 covers all of South Dakota. The eastern half, including Sioux Falls, is on Central Time; the western half, including Rapid City, is on Mountain Time.
Why get a 605 area code number?
A local 605 number gives your business a genuine connection to the South Dakota market — without the overhead of a physical location.
Local Market Access
Reach Sioux Falls customers and businesses with a familiar local number. 605 numbers signal local presence to every caller.
Professional Credibility
A 605 number anchors your business in Sioux Falls and South Dakota, giving clients and partners a recognizable local point of contact that builds immediate professional trust.
Higher Answer Rates
Local area codes are far less likely to be blocked. A 605 number keeps your outreach out of the spam folder.
Flexible Operations
Start with one 605 number and add more as you grow — all managed from a single letsdial dashboard.
How to obtain a 605 phone number.
Step 01 · Sign up
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Benefits of a local South Dakota number
A 605 area code tells South Dakota customers you're local and easy to reach.
- Local 605 numbers get answered more often than toll-free or out-of-state calls.
- Build local trust and brand recognition without a physical office.
- Keep your personal number private with a dedicated 605 business line.
Why local numbers win
Frequently asked about 605
Area code 605 covers Sioux Falls, Rapid City, Aberdeen, Brookings, Watertown, Pierre in South Dakota. It is the primary area code for this region.
Ready to call South Dakota your market?
Get a local 605 number for your business in minutes. No contracts, no hardware — just a trusted local presence in South Dakota from day one.
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