South Dakota area codes
One area code, 605, on Central and Mountain Time.
Calling South Dakota right now
Calling hours: Mon to Sat, 9 AM to 9 PM · Sun, no calls (South Dakota law)
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South Dakota's area code: 605
605 covers Sioux Falls, Rapid City, Aberdeen and Spearfish. Its page has the local time now, every place it serves, and when you can call.
See 605's cities and calling hoursWhen can you call South Dakota numbers?
Sales calls to homes and cell phones have legal hours, set by South Dakota law. Hold every number to them, since you can't tell a work line from a personal cell. Each area code's page has its local time now.
What applies in South DakotaMon to Sat, 9 AM to 9 PM · Sun, no calls
- Federal (TCPA and FTC rule)Every day, 8 AM to 9 PMCalls to residential and mobile numbers. Most calls to businesses are exempt from the FTC's rule.47 CFR 64.1200(c)(1); 16 CFR 310.4(c) (opens in a new tab)
- South Dakota lawMon to Sat, 9 AM to 9 PM · Sun, no callsCalls to residences.SDCL 37-30A-3(2) (opens in a new tab)
Local time comes from the area code, not from where the person is today. Mobiles keep their number when they move. Calling hours here are a guide, not legal advice. Every state's calling hours, with sources
South Dakota area code FAQ
How many area codes does South Dakota have?
One: 605.
What time zone is the South Dakota area code in?
Central Time (CST, UTC-6; CDT, UTC-5 in summer) and Mountain Time (MST, UTC-7; MDT, UTC-6 in summer). Each code's page says which.
When can you call South Dakota numbers?
Mon to Sat, 9 AM to 9 PM · Sun, no calls, local time, under South Dakota law.
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