605 Area Code – South Dakota Cities, Zip Codes & Scams

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📞 605 Area Code — Quick Reference
📍 LocationSioux Falls, South Dakota
🕐 Time ZoneCentral (UTC-6/UTC-5)
🗓️ StatusActive — Geographic

Calls from the 605 area code come from Sioux Falls and the surrounding South Dakota region. Whether you received an unexpected call from this number or you’re trying to figure out where a 605 number is based, this guide covers the exact location, time zone, spam reputation, blocking instructions, and which cities fall under this code.

📍 Where Is the 605 Area Code Located?

The 605 area code is located in South Dakota, primarily serving Sioux Falls and the surrounding region. It’s a standard geographic area code under the North American Numbering Plan (NANP). Keep in mind that mobile number portability means someone could carry a 605 number with them after moving — so the code tells you where the number was issued, not necessarily where the person is right now.

605 Area Code — Location Details
State/ProvinceSouth Dakota (SD)
Major CitySioux Falls
CountryUnited States (+1)
Time ZoneCentral (UTC-6/UTC-5)
TypeGeographic — Standard
NANPA StatusActive

🕐 605 Area Code Time Zone

The 605 area code operates in the Central Time Zone (UTC-6/UTC-5). Here’s how it compares to other US time zones:

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 Business hours (good to call)     Early / late hours     Night — do not call
Official Resources: Report Fraud — FTC Do Not Call Registry NANPA Directory
Time ZoneDifference from 605
Eastern Time+1 hour
Central TimeSame time
Mountain Time-1 hour
Pacific Time-2 hours
💡 Calling Tip: Reach someone in the 605 area between 10 AM – 4 PM their local time for the best chance of an answer. Calls outside those hours are more likely to be screened or ignored.

🛡️ Is 605 Area Code Spam or Scam?

Like most US area codes, 605 is used by both legitimate callers and scammers. The code itself is perfectly real — millions of people and businesses in Sioux Falls use it daily. But scammers frequently spoof 605 numbers because local-looking calls get answered more often than unfamiliar ones.

⚠️ Red Flag: If a 605 caller demands immediate payment via gift cards, wire transfer, or crypto — hang up. No legitimate organization uses these methods. Verify by calling the company’s official number directly.

How to verify: Don’t call back the number — look up the official number for whatever organization the caller claimed to represent and call that instead. Google the full 10-digit number in quotes to check if others have reported it as spam.

📵 How to Block 605 Spam Calls & Texts

Block on iPhone

  1. Open Phone → tap Recents
  2. Tap ⓘ next to the 605 spam number
  3. Scroll down → “Block this Caller”
  4. Silence all unknowns: Settings → Phone → Silence Unknown Callers → ON

Block on Android

  1. Open Phone → find the 605 number
  2. Tap ⋮ menu → “Block number”
  3. For broader blocking: Settings → Blocked numbers → Unknown toggle ON

Report Spam

  1. Forward spam texts to 7726 (SPAM)
  2. Report at reportfraud.ftc.gov
  3. Register at donotcall.gov or call 1-888-382-1222

🔍 Who Called from 605? Reverse Lookup

  1. Google the full 10-digit number in quotes — catches ~70% of unknown callers
  2. Check Whitepages.com or Truecaller.com
  3. Search 800notes.com for community reports
  4. No voicemail left? Almost certainly spam — legitimate callers leave messages
⚠️ One-Ring Scam: If a 605 number rings once and hangs up, do NOT call back. This scam connects you to a premium-rate line that charges your bill.

🔗 Nearby Area Codes

CodeLocationTime Zone

❓ 605 Area Code — FAQ

What state is 605 area code in?
The 605 area code is in South Dakota, serving Sioux Falls and surrounding areas.
What city does 605 cover?
605 primarily covers Sioux Falls and nearby communities in South Dakota.
Is 605 toll-free?
No. 605 is a geographic area code. Toll-free codes are 800, 833, 844, 855, 866, 877, 888.
What time zone is 605?
Central (UTC-6/UTC-5).
Is 605 a scam?
605 is legitimate — it serves real people in Sioux Falls. But scammers may spoof 605 numbers. Verify suspicious callers independently.
Why do I keep getting 605 calls?
Repeated 605 calls without a known contact are likely robocalls. Use your phone’s Silence Unknown Callers feature.
Can I get a 605 number remotely?
Yes — VoIP services like Google Voice offer 605 numbers regardless of where you live.
Is 605 cell or landline?
605 covers both. US area codes don’t distinguish between mobile and landline.
How do I block 605 calls?
iPhone: Settings → Phone → Silence Unknown Callers. Android: Phone → Settings → Blocked numbers. For area-code blocking, use Truecaller or RoboKiller.

🔗 Related Area Code Guides

    Updated April 2026 · Data from NANPA & FCC · areacodess.org/