South Dakota Business Phone Numbers
South Dakota does business on a single area code, 605, which means one three-digit prefix ties your company to the whole state. Whether you're calling customers in Sioux Falls or checking in with a ranch outside Pierre, a local number tells folks you belong here.
Get a South Dakota NumberSouth Dakota at a Glance
South Dakota runs on small business. The state is home to roughly 90,274 small companies, which make up about 99% of all businesses operating here [1]. That's a lot of local shops, contractors, and clinics competing for the same customers, and a local 605 number goes a long way toward earning trust.
Sioux Falls has quietly become one of the Midwest's busiest growth stories, with the metro outperforming nearly every regional peer in total building activity heading into 2026 [2]. Financial services, healthcare, and a growing cybersecurity cluster mean phones ring at all hours, so businesses need a system that follows them from the office to the truck.
Because South Dakota has no personal or corporate income tax, out-of-state companies keep opening satellite offices here [2]. If you're one of them, picking up a Tonet number in the 605 area code is the fastest way to look like a neighbor instead of a call center from three time zones away.
South Dakota Area Codes
The entire state shares a single area code, 605, which covers everything from the Black Hills to the Missouri River to the eastern farm country. One prefix means your number is instantly recognizable to anyone in South Dakota.
Major Cities in South Dakota
South Dakota's population clusters around a handful of hubs, with Sioux Falls carrying most of the weight and Rapid City anchoring the west. A single 605 number reaches all of them without any extra setup.
Phone Features Built for South Dakota Businesses
Every Tonet number comes with the tools you'd expect from a modern phone system, without the setup headache.
Auto Attendant
Route callers to the right person automatically, so a customer in Aberdeen doesn't get bounced around when they just want to book an appointment.
Call Recording
Save calls for training, quality checks, or settling the occasional he-said-she-said. Recordings are stored securely and easy to pull up later.
AI Transcription
Every voicemail and recorded call gets a searchable text version, which is a lifesaver when you're driving between Sioux Falls and Rapid City and can't listen.
Business SMS
Text customers from your 605 business number instead of your personal cell. Great for appointment reminders and quick service updates.
Mobile App
Take business calls from anywhere in the state, on the same number, whether you're at the shop or checking on a job site in the Hills.
Daily Billing
Plans start at $10 per user per month, billed daily at roughly $2.50 for extras like extra numbers. No annual contracts, cancel whenever.
Frequently Asked Questions
Can I get a 605 number if my business isn't based in South Dakota?
Yes. Tonet doesn't require a physical address in the state to assign you a 605 number, so it's a straightforward way to open a South Dakota presence.
How fast can I get a South Dakota number set up?
Usually within a few minutes. You sign up, pick an available 605 number, and start taking calls on the web or the mobile app the same day.
Can I port my existing South Dakota number to Tonet?
Yes, porting is free. Bring your current 605 number over and keep it, along with any published listings or business cards you already have out there.
Does one 605 number cover the whole state?
It does. Because South Dakota only has one area code, a single 605 number reads as local everywhere from Sioux Falls to Pierre to the western edge of the Black Hills.
How much does a South Dakota business number cost?
Plans start at $10 per user per month, billed daily. Additional numbers run about $2.50 per month each, and there are no annual contracts.
Ready to Sound Local in South Dakota?
Pick up a 605 number in a few minutes and start taking calls today.
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