Sioux Falls · Central Timesince 1947 · no overlay226 reported · 30 daysrank 287 of 331updated 8 Oct 2026
Area code 605 — Sioux Falls, South Dakota
Area code
605
Location
Sioux Falls, South Dakota
Location
Sioux Falls, South Dakota
Status
Active since 1947
Spam reports · 30 days
226 numbers
Area code 605 covers Sioux Falls and surrounding communities in South Dakota.
Updated 8 October 2026
Area code 605 is in South Dakota, shown here with Sioux Falls marked.
Now in Sioux Falls
Central Time · UTC−6, UTC−5 in summer
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Central Time
Where you are—
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Typical business hours, 9 to 5 Monday to Friday.
Typical business hours, 9 to 5 Monday to Friday, shown as the blue arc. A guide to when a real Sioux Falls office is likely to answer. It says nothing about who called you.
1947The original 86 area codes. All of South Dakota is 605.
Today1 code, none of them overlays.
01
Where is area code 605?
Area code 605 is in Sioux Falls, South Dakota, covering Sioux Falls and surrounding communities in South Dakota. All 605 numbers are on Central Time.
CitiesSioux Falls
02
Is area code 605 a scam?
No. Area code 605 is a legitimate area code serving Sioux Falls since 1947. Scammers spoof caller ID to display 605 numbers, which is why complaints exist against a code that is itself genuine.
Neighbour spoofing is the reason a local-looking number is not a guarantee. A caller anywhere in the world can display a 605 number, and the number they display may belong to a real business in Sioux Falls that has nothing to do with the call.
The callerAnywhere in the worldSets the caller ID their equipment sends.
What is displayed(605) 865-7569May belong to a real Sioux Falls business.
Your phoneLooks localA nearby code and prefix make you likelier to answer.
226Area code 605 had 226 different numbers reported for spam calls in the 30 days to 8 October 2026.
287thArea code 605 ranks 287th of 331 US geographic area codes by spam complaint volume.
70%Of the 245 complaints about area code 605 in the 30 days to 8 October 2026, 70% were reported as a recorded message or robocall.
23%The most reported subject on area code 605 is reducing your debt (credit cards, mortgage, student loans), appearing in 23% of its complaints in the 30 days to 8 October 2026.
Why am I getting text messages from area code 605?
Texts from 605 numbers follow the same pattern as calls — mostly local businesses and services. Treat any text asking for payment or credentials as suspect regardless of the code.
The common patterns are a wrong-number opener that turns into conversation, an unsolicited job offer, and a crypto or investment tip. Do not reply, do not follow the link, and forward the message to 7726 (SPAM) to report it to your carrier.
Pattern 1Wrong-number openerTurns into conversation.
Pattern 2Unsolicited job offerDo not reply, do not follow the link.
Pattern 3Crypto or investment tipTreat any payment ask as suspect.
Report it7726Forward the message. It spells SPAM on a keypad.
04 · The human layer
Who works in the Sioux Falls area?
Area code 605 is one of the originals from 1947 and covers the entire state of South Dakota. That makes it unusual: a 605 number could belong to a rancher near the Black Hills or a credit card operations center in Sioux Falls, four hundred miles east. Sioux Falls is where the business weight sits. The city became a national banking hub after South Dakota lifted interest rate caps in 1981, drawing Citibank and, later, Wells Fargo operations that employ thousands. Healthcare rivals finance: Sanford Health and Avera Health both run their headquarters and largest hospitals here. Sioux Falls, South Dakota had a population of 201,469 and a median household income of $75,970 in 2024, per DataUSA, with a poverty rate of 9.62 percent, low by national standards.
Who lives in the 605 region
One code for one state shapes how the number reads. A 605 number says South Dakota, full stop, and within the state it carries no geographic snobbery because everyone from Rapid City to Brookings shares it. Callers describe business conversation here as unhurried and plain, with less small talk than the South but more than the coasts, and a handshake reputation that still matters in agriculture, trucking, and community banking. Callers from outside should check the clock before dialing: the state splits between Central Time in the east, where Sioux Falls sits, and Mountain Time in the west. The state's lack of corporate income tax also means the person on the other end may be a trust company or holding entity rather than a storefront.
Area code 605 serves Sioux Falls and surrounding communities in South Dakota. It is in the Central Time zone.
What state is area code 605 in?
Area code 605 is in South Dakota. It is not in San Mateo — those are area code 650.
Is area code 605 toll free?
No. Area code 605 is a geographic area code serving Sioux Falls, South Dakota. The toll-free codes are 800, 833, 844, 855, 866, 877, 888, and a call to a 605 number is charged at your normal rate.
Why am I getting calls from 605?
Calls displaying a 605 number come from businesses and individuals in the Sioux Falls area, and from anywhere at all when caller ID is spoofed to look local. 226 605 numbers were reported to the FTC in the 30 days to 8 October 2026.
How do I block calls from area code 605?
Both iOS and Android can silence calls from unknown numbers, and every major US carrier offers free call-blocking. Blocking the whole of area code 605 is rarely worth it, because spoofed numbers change constantly and you would lose legitimate calls from Sioux Falls.