About Area Code 605
Area code 605 is a telephone area code serving Sioux Falls, South Dakota and surrounding regions. It is part of the North American Numbering Plan (NANP).
If you received a call from a 605 number you don't recognize, it could be a local business, resident, telemarketer, or spam caller based in the Sioux Falls area. Use the lookup tool above to identify the caller in seconds.
Note: Scammers frequently use "neighbor spoofing" — making calls appear to come from local area codes like 605 to increase answer rates. Always verify an unknown 605 number before calling back.
Common Reasons for Calls from 605 Numbers
- Local businesses or service providers in Sioux Falls, South Dakota
- Neighbors or community members you don't have saved
- Local government or public service notifications
- Telemarketing operations using local number spoofing
- Debt collectors or financial service calls
- Scammers spoofing 605 numbers to appear local
How to Look Up a 605 Phone Number
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