Is area code 605 a scam?

Area code 605 is a legitimate South Dakota area code, but scammers can spoof any number — including 605. Here's how to tell a real 605 call from a scam and how to stop spam calls.

Area code 605 is associated with South Dakota. The area code on caller ID only tells you where a number is registered — not who is calling or whether they are trustworthy. Because caller ID can be spoofed, the safest move is to look up the exact number, not just the area code.

Why did I get a call from 605?

• Neighbor spoofing — scammers fake a local South Dakota number so a familiar 605 shows on your screen and you're more likely to answer. The real caller can be anywhere.
• Robocalls and telemarketing cycling through 605 numbers.
• A real local caller — a Sioux Falls-area business, service, or someone returning your call.
• Debt collectors or surveys using a local-presence number.

How to tell a real 605 call from a scam

Judge the call by what it asks for, not the number. Warning signs: urgency or threats ("act now or you'll be arrested"); requests for gift cards, wire transfers, or cryptocurrency; callers claiming to be the IRS, SSA, your bank, or "tech support"; and anyone asking you to confirm a one-time code, password, or full SSN. A legitimate organization will let you hang up and call back on an official number.

How to stop spam calls from 605

Don't answer unknown 605 numbers — let them go to voicemail. Block persistent numbers, turn on your carrier's free spam filtering, register at donotcall.gov, and report unwanted calls to the FTC at reportfraud.ftc.gov.

Area code 605 overview · Look up a phone number

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Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of June 20, 2026. Refreshed monthly.