Sioux Falls and Rapid City share the same area code, 605, and our free South Dakota reverse phone lookup works for any number in the state. Fake lawsuit threats and bogus job offers top the reports.
South Dakota has one area code, 605, used statewide. Sioux Falls, Rapid City, and Aberdeen all share it.
South Dakota has approximately 1.2 million active phone numbers. Cell phones make up the majority with 959,000 users, while traditional landlines have diminished to 113,000 connections statewide. Internet phone services account for about 108,000 numbers.
South Dakota phone numbers recently reported for making unwanted sales calls or robocalls:
| Phone Number | FTC Complaints | Last Reported |
|---|---|---|
| (605) 415-9436 | ||
| (605) 316-3660 | ||
| (605) 210-6225 | ||
| (605) 608-9021 | ||
| (605) 223-2955 | ||
| (605) 299-2110 | ||
| (605) 468-2608 | ||
| (605) 468-2641 | ||
| (605) 923-0110 | ||
| (605) 432-9938 |
In September 2026, South Dakota residents filed 378 complaints to the FTC about phone numbers making unwanted calls and text messages, down 19% from the previous month.
Check unknown numbers reported by locals and find phone numbers for police, hospitals and other local services in the largest cities in South Dakota.
The official numbers for South Dakota government offices are in South Dakota State Phone Book. Use it to check a caller before you share anything.
The State of South Dakota Phone Book lists South Dakota state employees and offices, each with a tap-to-call phone number. Narrow it with the Keyword Search in the Filter State Employee Results panel, by name or office.
If someone claims to be calling for a state office, search the office and tap its number. The phone book loads inside SD.gov's Citizen Portal and can take a moment to appear.
Yes. South Dakota has no comprehensive state consumer privacy law. Residents using reverse phone lookup services for personal purposes face no state-level restrictions. Federal FCRA rules apply here as in every state: lookup results may not be used for employment screening, tenant decisions, or credit and insurance underwriting.
South Dakota doesn't have a privacy law, but you can still request removal from phone directory sites. Go to each site's privacy page and fill out their opt-out or removal form.
A reverse phone lookup can provide a business name, but that alone does not confirm legitimacy. While South Dakota has over 28,857 business establishments based on Census data, you should verify the company by searching for it in the South Dakota Business Info Search.
South Dakota has 959,000 mobile subscriptions, 108,000 VoIP lines, and 113,000 landlines.