South Dakota fax numbers and area codes
Every phone and fax number in South Dakota uses area code 605, and FaxToFax has local 605 fax numbers in stock. Send and receive faxes in your browser, with no fax machine or phone line.
- Area codes1
- In stock1
- Time zoneCentral & Mountain
- CapitalPierre
South Dakota on the map of the United States. Select any state to open its page.
South Dakota area codes
South Dakota has one area code.
- 605In stock
All of South Dakota: Sioux Falls, Rapid City, Aberdeen and Pierre
Local fax numbers in stock None in stock right now
Area codes in service from NANPA, the North American Numbering Plan Administrator (October 22, 2026). Stock checked October 22, 2026; it changes daily, and the number picker shows what’s available when you sign up.
Sending a fax to South Dakota
- Upload a PDF, PNG or JPG, or write a cover page with your letterhead.
- Choose United States as the recipient’s country and type the 10-digit fax number, for example (605) 555-0123.
- Check the number and send. You get a time-stamped delivery receipt.
Each page sent to South Dakota uses 1 plan page from a US or Canadian number, and a fax that isn’t delivered doesn’t use any.
Receiving faxes in South Dakota
Choose a number with a South Dakota area code (605) or a toll-free number. People fax it from any fax machine, and each fax lands in your private, encrypted FaxToFax inbox with an alert.
Moving an existing number to FaxToFax (porting) isn’t available yet.
Time zone. South Dakota is on Central Time in the east, including Sioux Falls and Pierre, and on Mountain Time in the west, including Rapid City. If you fax South Dakota offices from another time zone, schedule faxes for their business hours.
Healthcare and legal offices in South Dakota
Healthcare ›
Clinics, labs and pharmacies in South Dakota still exchange referrals, records requests and prior authorizations by fax. If your office handles protected health information, HIPAA applies wherever you are in the US. FaxToFax stores faxes encrypted, records every view and download in an audit log, and deletes faxes on the schedule you set. A Business Associate Agreement is available on Business plans.
Legal ›
Law offices fax notices, signed documents and records requests when they need a sender, a time and a receipt. Lawyers in South Dakota must protect client confidences under the state’s rules of professional conduct. FaxToFax puts your letterhead on cover pages, keeps a delivery receipt with every fax, and limits who can open faxes with access roles.
FaxToFax provides tools that support compliance; each office remains responsible for its own obligations. The Trust Center lists the programs we currently meet.
South Dakota fax FAQ
Can I get a South Dakota fax number?
Yes. When we last checked (October 22, 2026), FaxToFax had local fax numbers in South Dakota’s area code, 605. You pick your number when you sign up, and you can choose a toll-free number instead.
What area codes does South Dakota use?
South Dakota uses one area code, 605.
What time zone is South Dakota in?
South Dakota is on Central Time in the east, including Sioux Falls and Pierre, and on Mountain Time in the west, including Rapid City.
How do I send a fax to South Dakota?
In FaxToFax, choose United States as the recipient’s country and type the 10-digit fax number, for example (605) 555-0123. Each page uses 1 plan page from a US or Canadian number, and you get a time-stamped delivery receipt.
Can I move my current South Dakota fax number to FaxToFax?
Not yet. Moving an existing number (porting) isn’t available yet, so you’d choose a new FaxToFax number and give it to the people who fax you.
