South Dakota business phone guide

South Dakota by the numbers

South Dakota had 925,000 residents in the Census Bureau's July 2024 estimate, up 4.3% from April 2020. The U.S. population grew 2.6% over the same period. County Business Patterns counted 29,106 business establishments in the state in 2023 with 383,805 mid-March employees and $20.7 billion in annual payroll. The average establishment has 13.2 employees. 55.9% of establishments with employees had fewer than five people. The three largest sectors by establishments are retail trade (3,838), construction (3,802), and other services (except public administration) (2,986).

How South Dakota's businesses compare

South Dakota has 31.5 business establishments per 1,000 residents, 28.0% above the U.S. figure of 24.6. Establishments average 13.2 employees against 16.7 nationally, and payroll per employee is $53,870 (21.2% below the U.S. $68,342). 55.9% of establishments with employees have fewer than five people (U.S.: 55.5%), while 4.2% have 50 or more. Most establishments are far smaller than the average suggests, so it pays to price a phone plan at the headcount you actually have rather than the average.

Phone numbers and carriers in South Dakota

NANPA lists 1 geographic area code in service in South Dakota, with 745 central office codes assigned across 269 rate centers and held by 92 carriers. 605 has the most assigned codes (745). The newest in service is 605, since January 1, 1947.

Small-business industries in South Dakota

Among the 141 phone-heavy small-business industries these guides cover, the largest in South Dakota by establishment count are insurance agencies and brokerages (745), full-service restaurants (675), and limited-service restaurants (623). Each links to a page with metro breakdowns, team sizes and phone costs for that industry in South Dakota.

Metro and micropolitan areas

12 Census metro or micropolitan areas include part of South Dakota. The largest is Sioux Falls, SD-MN with 308,000 residents.

Choosing an area code in South Dakota

Every South Dakota area code requires ten-digit dialing for local calls, according to NANPA's dialing-plan data, so customers always see and dial the full number. None of South Dakota's area codes is in an overlay, so each code maps to its own territory. A business that serves one city usually takes a number in that city's dominant code; one that covers a region can hold up to 3 local numbers on Callata's plan.

Largest South Dakota cities for local numbers

46 South Dakota cities and towns have their own local-number page. The most populous are Sioux Falls (605), Rapid City (605), Aberdeen (605), and Brookings (605).

What phone service costs a South Dakota business

The comparison below uses 13 users, the rounded average establishment size in South Dakota. At list prices checked September 28, 2026, that is $324.35 a month on Ooma Office Pro and $390.00 on RingCentral RingEX Core. On Callata the same 13 people cost $259.00 a month, less than either per-seat plan.

Callata in South Dakota

For $99 a month, Callata puts a team of up to 5 on one plan ($20 for each person after that): up to 3 local numbers, unlimited inbound calls, a pooled allowance of 1,500 outbound US and Canada minutes per user, browser and cell calling, voicemail transcription with urgency triage, recorded calls with AI summaries and business-hours routing, with E911 on every number.

If you already have a number in South Dakota, porting it to Callata is free. Texting from a local number requires a one-time carrier registration (10DLC, $49), and the numbers available in any area code depend on carrier inventory when you choose them.

Optional AI agents (receptionist, sales, support or scheduler) can answer calls after hours or when nobody picks up, take messages, text, email and transfer to your team. They are billed from prepaid AI minutes at $0.25 per minute, identify themselves as AI, and may only place outbound calls to people who consented, between 8am and 9pm.