605 area code: location, time zone and numbers
South Dakota is served by area code 605, a US telephone area code that has been in service since 1947.
- Location
- Every part of South Dakota
- Operating since
- 1947
- Local time zone
- Both Central and Mountain time
- Overlay
- None: no other code serves its area
- Calls within the area
- Full 10-digit dialling
- The rate centres
- 269
- The projected exhaust
- 2034
- Country dialling prefix
- +1 (United States)
NANPA public reports are the source: the area code report and the rate-centre report, file dated 11/01/2026. For the exhaust year, see NANPA projections 2026-1, dated April 2026. We are not an official NANPA site.
Get your own 605 number
There are two routes to a 605 number. New numbers come with a provider's plan, and each one is chosen at sign-up from the pool that provider holds in the code. Sellers post numbers they already hold, often with a pattern, at a one-time price. After buying, you transfer the number to a provider.
Providers ranked by first-year cost
| Provider | Cheapest plan | First year | Link |
|---|---|---|---|
 Free app | Basic (Just for me), free | $0 | Open Google Voice |
 Free app | Free plan, free | $0 | Open TextNow |
 Developer API | Pay-as-you-go local number, $1.15 a month | $13.80 | Open Twilio |
 Second-number app | Standard, $3.99 a month billed yearly | $47.99 | Open Burner |
 Toll-free specialist | Solo, $6.99 a month billed yearly | $84 | Open UniTel Voice |
 Second-number app | Deluxe (local number), $6.99 a month billed yearly | $102.88 | Open GoDaddy Conversations (formerly Smartline) |
Sellers that list local numbers
| Seller | What it sells | Listed price | Monthly fee | Link |
|---|---|---|---|---|
 Marketplace | Local numbers | From $9 one-time | None stated | Search at Exclusive Digits |
 Marketplace | Local and toll-free | From $9.95 one-time | $2.99 a month | Search at NumberBarn |
 Number broker | Local and toll-free | From $99 one-time | None stated | Search at RingBoost |
 Number broker | Local and toll-free | From $100 one-time | None stated | Search at PhoneNumberExpert |
| 212areacode.comNumber broker | Local numbers | From $150 one-time | None stated | Search at 212areacode.com |
Some sellers and providers may pay us a referral fee. The order never changes, and it is based on first-year cost. How we make money
Places in the 605 area code
For 605, NANPA lists 269 rate centres. Numbers are assigned to each one, a local calling area:
Dell Rapids, De Smet, Custer, Crooks, Cresbard, Creighton, Corsica, Conde, Columbia, Colton, Clearfield, Clear Lake, Clayton, Clark, Claremont, Claire City, Chester, Chamberlain, Centerville, Center, Cavour, Castlewood, Canton, Canova, Canistota, Camp Crook, Burke, Buffalo Gap, Buffalo, Bryant Willow Lake, Brookings Rural, Brookings, Britton, Bristol, Bridgewater, Brandt, Brandon, Bradley, Bowdle, Bonesteel, Blunt, Bison, Big Stone City, Beresford, Belvidere, Belle Fourche, Baltic, Avon, Astoria, Artesian, Armour, Arlington, Ardmore, Andover, Alsen, Alpena, Alexandria, Alcester, Academy, Aberdeen, plus 209 more.
605 area code questions
What area does 605 cover?
South Dakota is where 605 rings.
Which country code goes with a 605 number?
+1. Because 605 sits in the North American Numbering Plan, calling from abroad means dialling +1 605 plus the 7-digit number.
What time is it in the 605 area code?
Central and Mountain time apply to 605.
Which callers use 605 numbers?
Homes, mobiles, local businesses and callers who fake a local number all use numbers in this code. What a 605 number shows on your screen is the place it was assigned, not the identity of the caller.