A 605 reads "South Dakotan"
The state's only area code since 1947 — 605 is the unmistakable SD credential. Sioux Falls bankers, Rapid City tourism operators, ranchers and reservation businesses all use 605.
Live · South Dakota coverage · 1 codes
South Dakota area codes the complete map & list.
Get a 605 South Dakota number — Sioux Falls, Rapid City, Aberdeen, Pierre or anywhere from the Black Hills to the prairie — on the phone you already own. The Mount Rushmore State's single statewide prefix on one app.
South Dakota has 1 active area code — 605. You can get a virtual South Dakota phone number from any of these area codes through CallMama without a US address or SIM card.
No US address required Works from anywhere 60-second activation
910KPopulation
66Counties
1Area codes
1947First assigned
CTUTC −6
60sTo activate
01 — SOUTH DAKOTA AT A GLANCE
South Dakota, by the numbers.
South Dakota was assigned a single area code in 1947: 605, covering the entire state. For 78 years 605 has carried all of South Dakota — Sioux Falls in the east, Rapid City and the Black Hills in the west, the Pine Ridge and Rosebud reservations in between.
South Dakota is one of only 11 US states that have never received an additional area code. Its modest population (910K, 46th of 50) and large geography (17th-largest by area) have kept 605 comfortably sufficient for nearly eight decades.
South Dakota notably spans two time zones — the eastern half is Central Time, the western half (Rapid City, Black Hills, Pine Ridge) is Mountain Time — but the entire state shares the same 605 area code. "605" appears on local apparel, Black Hills tourism gear and Sioux Falls business cards as the state's identity badge.
DID YOU KNOW?
South Dakota's 605 area code spans two time zones — eastern SD (Sioux Falls, Brookings, Aberdeen) is Central Time, while western SD (Rapid City, Mount Rushmore, the Black Hills, Pine Ridge) is Mountain Time. A 605 number's "local time" depends on which half of the state you're calling.
02 — REGIONAL MAP
South Dakota area code region map.
Every South Dakota area code plotted at its primary city. Click any marker for that code's details. Overlays share geography with their parent code — they're shown offset on the map for visibility.
605Sioux Falls
03 — AREA CODES
All South Dakota area codes. One state.
Every South Dakota metro covered by a different prefix. Open any card to view its full detail page.
04 — CITIES
310+ South Dakota cities, one searchable list.
Find your city, find its area code, then activate a number with that prefix.
Sioux Falls605
Rapid City605
Aberdeen605
Brookings605
Watertown605
Mitchell605
Yankton605
Pierre605
Huron605
Vermillion605
Spearfish605
Brandon605
Box Elder605
Madison605
Sturgis605
Belle Fourche605
Hot Springs605
Lead605
Deadwood605
Mobridge605
Tea605
Harrisburg605
Dell Rapids605
Lennox605
Winner605
Hartford605
Beresford605
Custer605
Chamberlain605
Milbank605
Sisseton605
Redfield605
05 — WHY SOUTH DAKOTA
Six reasons to pick a South Dakota number.
A local South Dakota prefix outperforms an out-of-state cell at every customer touchpoint.
Sioux Falls financial-center credibility
A 605 prefix carries Sioux Falls banking credibility — Citibank, Wells Fargo and major credit-card operations are headquartered there due to SD's favorable banking regulations.
Cover both time zones with one prefix
SD spans Central and Mountain time zones. 605 covers both — useful for businesses operating across eastern (Sioux Falls/Brookings) and western (Rapid City/Black Hills) Dakota.
Tourism + ranching dual identity
605 works for both tourism (Mount Rushmore, Black Hills, Sturgis) and agriculture (corn, cattle, sunflowers). Locals recognise it as native to either world.
STIR/SHAKEN-clean caller ID
NANPA-routed South Dakota numbers pass carrier authentication, so cold-call recipients see your local prefix instead of a flagged "Spam Likely" tag.
Held free if you pause
Cancel service and your South Dakota number is reserved free for 12 months — keep your 605 across seasonal ranching cycles and Sturgis rallies.
Ready to sound local in South Dakota?Pick your South Dakota area code and start receiving calls today.
Get a South Dakota number 06 — REACH
910K South Dakotans across every area code.
Each South Dakota area code covers a distinct region. Here's how the population breaks down.
Source: US Census Bureau / ACS estimates.
$65BState GDP
280KSioux Falls metro population
$70KMedian household income
7hDrive end-to-end across South Dakota
07 — ACTIVATE
Three taps to a South Dakota number.
Pick the digits, install the app, take the first call. That's the whole sequence.
PICK A 605 NUMBER
(605) 555-▮▮▮▮
605-555-0142605-555-0317
Pick your digits
CallMama generates 10–20 available numbers in any South Dakota area code. Vanity patterns supported.
iOS app ✓ Ready
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Install the app
Install CallMama on the device you already use. Sign in once — your South Dakota number is linked.
Hey — is this South Dakota?Yep, local SD. ✓
Start dialing
Inbound and outbound on the same device. Local South Dakota caller ID on every outgoing call.
08 — EVERY US AREA CODE
Browse every US area code.
Search by state, city, or number — then click any code to open its detail page. South Dakota is in here too.
List of USA States and Their Area Codes
| State | Area Codes | Time Zone | Count |
|---|---|---|---|
| Alabama | 205251256334659938 | CT | 6 |
| Alaska | 907 | AKT | 1 |
| Arizona | 480520602623928 | MST | 5 |
| Arkansas | 479501870 | CT | 3 |
| California | 213310408415510619650714818916 | PT | 10 |
| Colorado | 303719720970 | MT | 4 |
| Connecticut | 203475860959 | ET | 4 |
| Delaware | 302 | ET | 1 |
| District of Columbia | 202 | ET | 1 |
| Florida | 239305321407561727786813850904954 | ET* | 11 |
| Georgia | 229404470478678706762770912 | ET | 9 |
| Hawaii | 808 | HST | 1 |
| Idaho | 208986 | MT* | 2 |
| Illinois | 217224309312331618630708773779815847872 | CT | 13 |
| Indiana | 219260317463574765812930 | ET* | 8 |
| Iowa | 319515563641712 | CT | 5 |
| Kansas | 316620785913 | CT* | 4 |
| Kentucky | 270364502606859 | ET* | 5 |
| Louisiana | 225318337504985 | CT | 5 |
| Maine | 207 | ET | 1 |
| Maryland | 240301410443667 | ET | 5 |
| Massachusetts | 339351413508617774781857978 | ET | 9 |
| Michigan | 231248269313517586616734810906947989 | ET* | 12 |
| Minnesota | 218320507612651763952 | CT | 7 |
| Mississippi | 228601662769 | CT | 4 |
| Missouri | 314417573636660816 | CT | 6 |
| Montana | 406 | MT | 1 |
| Nebraska | 308402531 | CT* | 3 |
| Nevada | 702725775 | PT | 3 |
| New Hampshire | 603 | ET | 1 |
| New Jersey | 201551609732848856862908973 | ET | 9 |
| New Mexico | 505575 | MT | 2 |
| New York | 212315332347516518585607631646680716718838845914917929934 | ET | 19 |
| North Carolina | 252336704743828910919980984 | ET | 9 |
| North Dakota | 701 | CT* | 1 |
| Ohio | 216234330380419440513567614740937 | ET | 11 |
| Oklahoma | 405539580918 | CT | 4 |
| Oregon | 458503541971 | PT* | 4 |
| Pennsylvania | 215267272412445484570610717724814878 | ET | 12 |
| Rhode Island | 401 | ET | 1 |
| South Carolina | 803843854864 | ET | 4 |
| South Dakota | 605 | CT* | 1 |
| Tennessee | 423615629731865901931 | CT* | 7 |
| Texas | 210214254281325346361409430432469512682713737806817830832903 | CT* | 20 |
| Utah | 385435801 | MT | 3 |
| Vermont | 802 | ET | 1 |
| Virginia | 276434540571703757804 | ET | 7 |
| Washington | 206253360425509564 | PT | 6 |
| West Virginia | 304681 | ET | 2 |
| Wisconsin | 262414534608715920 | CT | 6 |
| Wyoming | 307 | MT | 1 |
| Puerto Rico | 787939 | AST | 2 |
Showing all 52 states & territories* State spans multiple time zones — code-level zone may differ.
09 — ANSWERS
Frequently asked questions about South Dakota area codes.
What is South Dakota's area code?
605 — assigned in 1947 when the NANP launched. It has been South Dakota's only area code for 78 years, covering Sioux Falls, Rapid City, Aberdeen, Brookings, Watertown, Mitchell, Pierre and every town across all 66 counties.
Does South Dakota have only one area code?
Yes. South Dakota has never been split or overlaid — 605 covers the entire state and has since 1947. SD is one of only 11 US states with a single original area code.
What area code is Sioux Falls?
605 — covers Sioux Falls (SD's largest city), the entire eastern South Dakota financial corridor (Citibank, Wells Fargo), Brookings (SDSU), Watertown, Aberdeen and the eastern prairie region.
What area code is Rapid City and the Black Hills?
605 — same as the rest of the state. Covers Rapid City, the Black Hills, Mount Rushmore, Crazy Horse, Deadwood, Sturgis, Spearfish and all of western SD (on Mountain Time, but still 605).
Why does South Dakota have only one area code?
South Dakota's relatively small population (910K) means 605 still has number capacity after 78 years. The state's rural geography and stable cellular demand have kept the single-code arrangement intact.
Can I get a South Dakota number if I don't live in SD?
Yes. CallMama doesn't require a South Dakota billing address or proof of in-state residency. Pick a 605 SD number from anywhere in the world — useful for SD banking entities, ranching businesses or Mount Rushmore-adjacent operations.
Will my outbound calls show a South Dakota prefix?
Yes. Every outbound call displays your 605 area code on the recipient's caller ID — Sioux Falls bankers, Rapid City tour operators and Aberdeen ranchers all see a familiar prefix.
Can I port my existing South Dakota number to CallMama?
Yes. Any SD number from CenturyLink, Midco, Verizon, AT&T, T-Mobile or any other US carrier can be ported in. Porting typically completes in 3–7 business days.
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