605 area code
Area code 605 is in South Dakota. It covers Sioux Falls, Rapid City, Aberdeen and 508 other places: 374 ZIP codes in Minnehaha, Pennington, Lincoln and 64 other counties. It spans two time zones: local time there is Central or Mountain. In service since 1947, with no overlay.
- State
- South Dakota
- Time zone
- Central and Mountain
- Largest city
- Sioux Falls
- Overlays
- none
- In service since
- 1947
- Rate centres
- 269
- Prefixes assigned
- 745 (7,450,000 numbers)
Who calls from a 605 number
NANPA records the carrier each block of 605 numbers is assigned to. Of the 6.7 million 605 numbers assigned, 40% are with local phone companies (Qwest (CenturyLink) and Venture Communications Cooperative); 37% with cable, internet-calling, business and other carriers (Onvoy and Bluepeak); 23% with mobile carriers (Verizon Wireless and AT&T Mobility).
That is who the numbers were assigned to: people keep their number when they change carrier, so any one number may have moved since.
| Carrier | Kind | Share |
|---|---|---|
| Verizon Wireless | Mobile | 12% |
| Qwest (CenturyLink) | Landline | 12% |
| Onvoy | Cable, VoIP, other | 8% |
| AT&T Mobility | Mobile | 8% |
| Bluepeak | Cable, VoIP, other | 5% |
| Venture Communications Cooperative | Landline | 4% |
An area code says where a number was issued, not where the caller is: people keep their numbers when they move, and caller ID can be set to show any number, which the FCC calls spoofing. If a call you did not expect asks for money or personal details, the FCC advises hanging up and calling the company back on a number you look up yourself. Unwanted calls can be reported to the FTC at ReportFraud.ftc.gov.
Places in area code 605
The 229 places with a telephone rate centre of their own using 605, largest first. Each links to its ZIP codes.
Nearby places using 605
These places have no rate centre of their own in NANPA's records; the nearest one uses 605. Near an area-code boundary that can be wrong for part of a town.
- Box Elder
- Harrisburg
- Black Hawk
- Rapid Valley
- Tea
- Dakota Dunes
- Summerset
- Lead
- Blackhawk
- Ellsworth Afb
- Colonial Pine Hills
- Fort Pierre
- North Spearfish
- Green Valley
- North Eagle Butte
- Aurora
- Renner
- Deadwood
- Ashland Heights
- Manderson
- Oglala
- Piedmont
- Agency Village
- Colman
- Lake Madison
- Whitewood
- Meadow View Addition
- Boulder Canyon
- Manderson-White Horse Creek
- Allen
- Mina
- Wonderland Homes
- Lower Brule
- Bryant
- Antelope
- Johnson Siding
- Blucksberg Mountain
- McLaughlin
- St. Francis
- Parmelee
- Shindler
- Oacoma
- Ramona
- Wanblee
- Wounded Knee
- Gayville
- Warner
- Union Center
- Montrose
- Prairiewood Village
- West Brule
- Willow Lake
- Porcupine
- Chancellor
- Oahe Acres
- Howes
- Mountain Plains
- Lake Poinsett
- Trent
- Colome
ZIP codes in area code 605
374 ZIP codes in 352 towns, by the town each is mailed to, largest first. Each links to its own page.
Where 605 numbers are issued
NANPA's rate centres with the most 605 prefixes (each prefix is 10,000 numbers), under NANPA's own abbreviated names.
| Rate centre | Place | Prefixes |
|---|---|---|
SIOUX FLS | Sioux Falls | 92 |
RAPID CITY | Rapid City | 50 |
ABERDEEN | Aberdeen | 22 |
SPEARFISH | Spearfish | 20 |
WATERTOWN | Watertown | 17 |
HURON | Huron | 15 |
Counties
The counties of its ZIP codes, most residents first, with how many of its ZIP codes each has.
- Minnehaha County (25)
- Pennington County (9)
- Lincoln County (9)
- Meade County (13)
- Brown County (15)
- Brookings County (8)
- Codington County (6)
- Lawrence County (7)
- Yankton County (7)
- Davison County (3)
- Beadle County (9)
- Hughes County (3)
- Union County (4)
- Clay County (3)
- Oglala Lakota County (7)
- Lake County (7)
- Butte County (4)
- Charles Mix County (7)
- Roberts County (7)
- Turner County (7)
- Dewey County (7)
- Grant County (10)
- Custer County (4)
- Todd County (5)
- Fall River County (5)
- Hutchinson County (7)
- Bon Homme County (5)
- Kingsbury County (7)
- Spink County (10)
- Moody County (4)
- Tripp County (6)
- McCook County (6)
- Deuel County (7)
- Day County (7)
- Brule County (4)
- Hamlin County (5)
- Marshall County (6)
- Perkins County (5)
- Gregory County (6)
- Clark County (6)
- Corson County (8)
- Lyman County (6)
- Hand County (6)
- Edmunds County (3)
- Bennett County (3)
- Douglas County (5)
- Stanley County (2)
- Potter County (4)
- Sanborn County (3)
- Aurora County (3)
- Hanson County (3)
- Jackson County (4)
- McPherson County (4)
- Miner County (4)
- Mellette County (4)
- Walworth County (4)
- Haakon County (3)
- Faulk County (4)
- Buffalo County (2)
- Jerauld County (2)
- Hyde County (3)
- Ziebach County (2)
- Sully County (2)
- Campbell County (2)
- Jones County (3)
- Harding County (2)
- Emmons County (1)
Which code covers where you are now? What area code am I in? answers from your location.
Questions about area code 605
Where is area code 605?
Area code 605 is in South Dakota. It covers Sioux Falls, Rapid City, Aberdeen and 508 other places: 374 ZIP codes in Minnehaha, Pennington, Lincoln and 64 other counties.
What ZIP codes are in area code 605?
374 ZIP codes, by the town each is mailed to: Sioux Falls (15, 57101 to 57198), Rapid City (4, 57701 to 57709), Aberdeen (2, 57401 to 57402), Brookings (2, 57006 to 57007) and 348 more towns. The full list is on this page.
What time zone is area code 605 in?
Central and Mountain time.
Is a 605 number a mobile or a landline?
It can be either. 23% of 605 numbers are assigned to mobile carriers and 40% to local phone companies (NANPA, 2026-10-10); the rest are with cable, internet-calling, business and paging carriers. A number keeps its area code when it moves to another carrier.
Does a 605 number mean the caller is in South Dakota?
Not necessarily. An area code says where the number was first issued. People keep their numbers when they move or switch carriers, and calling software can show any number, so a 605 call can come from anywhere.
All 1 South Dakota area codes, by area, with the cities each covers
Source: NANPA NPA database, central office code and thousands-block assignments, 2026-10-10. Places are matched to NANPA's rate centres by name; see sources.
Cite this page
zipcodes.pro. “Area code 605.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-code/605
Underlying data is public domain or openly licensed — sources, vintages and licences.