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South Dakota · Central Time

605 Area Code: Sioux Falls, SD

The 605 area code covers Sioux Falls, Rapid City, Aberdeen and Brookings in South Dakota, primarily on Central Time. Here is the current local time there, and whether you can legally place a solicitation call to a 605 number right now.

Current local time in the 605 area code

Current local time in the 605 area code

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Area code 605 straddles two time zones. This is its primary zone, so numbers near the border may be an hour off.

Can you legally call a 605 number right now?

Checking…

DayLegal calling window in South Dakota
SundayNo calls
Monday9:00 AM-9:00 PM
Tuesday9:00 AM-9:00 PM
Wednesday9:00 AM-9:00 PM
Thursday9:00 AM-9:00 PM
Friday9:00 AM-9:00 PM
SaturdayNo calls

Windows shown are the stricter of the federal TCPA/TSR rule (8 a.m.-9 p.m. local) and South Dakota's own statute, in the called party's local time. Informational only, not legal advice. Check any number against the full TCPA calling hours calculator.

Area code 605 at a glance

StateSouth Dakota
Principal citySioux Falls
Time zoneCentral Time (spans two zones)
Overlay codesNone
Weekday calling window9:00 AM-9:00 PM local
CountryUnited States

Cities in the 605 area code

These are the main population centers 605 serves. Smaller towns across the same South Dakota region share the code.

  • Sioux Falls
  • Rapid City
  • Aberdeen
  • Brookings
  • Watertown

Calling 605 numbers legally

South Dakota is stricter than federal law. Automatic telephone dialing systems may solicit only on weekdays 9 a.m.-9 p.m.: no weekend autodialed solicitation in South Dakota. Because the window follows the called party's local time, a 605 number is governed by South Dakota rules no matter where you are dialing from. The weekend ban applies to autodialed solicitation; systems must also disconnect within 20 seconds of a hang-up.

Ringless voicemail sits under the same rules as a live call, which is why TCPA compliance matters before you drop to a list. To check a whole list rather than one code, the phone number formatter tags every number with its state so you can segment sends by time zone.

FAQ

605 area code questions

605 is a US telephone area code serving South Dakota, primarily on Central Time. Its principal city is Sioux Falls, and it also covers Rapid City, Aberdeen and Brookings.
Area code 605 is in the state of South Dakota. It serves Sioux Falls, Rapid City, Aberdeen and Brookings, and its principal city is Sioux Falls.
The 605 area code is primarily on Central Time (America/Chicago), but it straddles two time zones, so numbers near the border may be one hour different.
It depends on the local time in South Dakota. Automatic telephone dialing systems may solicit only on weekdays 9 a.m.-9 p.m.: no weekend autodialed solicitation in South Dakota. The live verdict above checks the current time against that window for you.
On weekdays, solicitation calls to South Dakota numbers are permitted 9:00 AM to 9:00 PM local time. South Dakota prohibits solicitation calls on Sundays entirely.
Not by itself. 605 is a legitimate South Dakota area code used by residents and businesses in Sioux Falls and Rapid City. Scammers do spoof caller ID to show a local area code, because people answer local numbers more often, so treat an unexpected call asking for payment or personal details with suspicion regardless of the prefix.

Reaching Sioux Falls at scale?

VoiceDrop delivers ringless voicemails in your own AI-cloned voice and two-way SMS to South Dakota lists, with calling-hour and DNC rules enforced automatically so every drop lands inside the legal window.

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