Discovering the truth about a phone number, email, or address history can be eye-opening, please use this tool with caution.USA Area code 605 - All of South Dakota
Area code 605 is a statewide North American Numbering Plan code serving all of South Dakota; its largest city is Sioux Falls. It was activated in 1947 and today serves all of South Dakota, home to roughly 935,094 residents (US Census Bureau estimate, July 2025) .
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Who called me from area code 605?
A call from area code 605 can come from anywhere in South Dakota - it is a statewide code, with Sioux Falls its largest city - but caller ID spoofing means the area code alone cannot confirm who called. Right now, 25 605 numbers carry scam reports on this page. The only reliable way to identify the caller is to check the full 10-digit number:
- Run the number through the reverse phone lookup at the top of this page to see the owner's name, carrier, and location.
- Compare it against the recently reported scam numbers in 605 below.
- If the call was unwanted, report it to the FTC and use the report form on this page so other 605 residents see it.
Report a scam call from 605 Help other 605-area residents - takes 20 seconds, no signup
Reports are reviewed by our team before appearing on the page. The highest-reported numbers get added to the “Recently reported scam numbers” list above with a “community” badge.
Should I answer a call from a 605 number? Take the 30-second quiz - 5 questions, verdict + advice
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Next step: run a reverse-phone lookup on the number to see everything public about it.
Where is the 605 area code? Coverage map
The pin marks Sioux Falls, the largest city in South Dakota. Zoom and pan to explore the coverage region.
Interactive map. Click a pin for city details. Data © OpenStreetMap contributors.
Cities in the 605 area code
Area code 605 serves the following 211 communities:
Area codes near 605 (overlay + neighboring)
If a caller ID shows one of these codes, the call is probably still from the Sioux Falls area or a nearby region. Click any code to see its own page.
605 area code robocall complaints (FCC data)
Monthly count of FCC complaints tagged to numbers in area code 605 over the last 12 months.
67 complaints in the last 12 months. That's about 51% fewer robocall complaints per capita than the US average - 7 per 100,000 residents vs a national average of 14.7.
Source: FCC Consumer Complaint Data (dataset vakf-fz8e). Data as of August 9, 2026. Refreshed monthly.
How 605 area code spam calls arrive
Based on 67 FCC complaints in the last 12 months, here's how 605 spam calls reached recipients:
FCC Consumer Complaint Data, last 12 months as of August 9, 2026. Refreshed monthly. Note: the FCC dataset labels method (Live Voice / Prerecorded / SMS) but does not classify scam type (IRS impersonation, tech support fraud, etc.) - those come from community reports.
Recently reported scam numbers in 605
Numbers reported to the FCC or by our community in the last 12 months. Click any to run a full reverse-phone lookup.
Source: FCC Consumer Complaint Data, last 12 months as of August 9, 2026. Refreshed monthly. Numbers submitted via the report form near the top of this page get added here with a “community” badge after moderation.
How to block 605 spam calls (by carrier)
Getting repeated spam calls from 605 numbers around Sioux Falls, South Dakota? You can't legitimately block every 605 call without also missing legitimate ones from Sioux Falls, South Dakota - so the practical fix is to turn on your carrier's free spam filter and register on the national do-not-call list. Step-by-step for each major US carrier below.
AT&T
- Download the free AT&T ActiveArmor app (iOS + Android).
- Sign in with your wireless number.
- Enable Fraud Blocking and Suspected Spam Warning.
- To block a specific number, tap the call in your history → Block.
Verizon
- Download the free Verizon Call Filter app (iOS + Android).
- Sign in with your Verizon account.
- Turn on Spam Filter.
- To block a specific number: My Verizon → Blocks → Add Number.
T-Mobile
- Download the free Scam Shield app (iOS + Android).
- Enable Scam Block (blocks known scam calls silently).
- Use Scam ID to see “Scam Likely” caller ID on suspicious numbers.
- To block a specific number, dial
#662#from your device.
All carriers
- Register on the FTC's National Do-Not-Call list.
- Report unwanted calls to the FCC at fcc.gov/complaints.
- On iPhone: Settings → Phone → Silence Unknown Callers.
- On Android: Phone app → ⋮ → Settings → Caller ID & spam.
Sources: carrier support pages (AT&T, Verizon, T-Mobile), FCC consumer guides. Free features as of 2026. Every one of these steps costs nothing.
History of the 605 area code
state of South Dakota. The numbering plan area was designated in 1947, when the American Telephone and Telegraph Company (AT&T) devised a comprehensive telephone numbering plan for the United States and Canada.
605 area code FAQ: common questions
What area code is 605?
Area code 605 is a North American Numbering Plan area code that serves Area code for South Dakota, United States in South Dakota, primarily including Sioux Falls and surrounding communities. It was activated in 1947.
Where does area code 605 cover?
Area code 605 covers the Sioux Falls, South Dakota area.
Is 605 a real area code or a scam?
605 is a real, actively-assigned US area code - not itself a scam. However, spammers do use 605 numbers because the code is well-known and appears local to millions of residents. Always verify the specific number, not the area code.
How do I block 605 spam calls?
You cannot legitimately block an entire area code without also blocking legitimate calls from Sioux Falls. Better options: register on the National Do-Not-Call list, enable your carrier's spam-filter (all major US carriers now offer this free), and report unwanted calls to the FCC at fcc.gov/complaints so they show up in the trend data on this page.
What's the overlay area code for 605?
605 does not currently have an overlay area code assigned. New numbers in the region are still issued with the 605 prefix.
Sources
Or explore reverse-phone lookup for any US number.