605 Area Code
Covers Sioux Falls and nearby communities in South Dakota.
(605) 555-0142Area code 605 map
Interactive coverage map for area code 605, centered on Sioux Falls, South Dakota
43.5500, -96.7003
Open in OpenStreetMapArea code 605 coverage map — centered on Sioux Falls. Shaded area shows the approximate reach around the primary city.
605 is the area code for Sioux Falls and the surrounding part of South Dakota. It reaches roughly 235,000 people across places such as Sioux Falls, Rapid City, Aberdeen, Pierre and more. The region observes Central time, so a number like (605) 555-0142 is on that clock right now. On the ground it spans Lincoln, Pennington, Brown and nearby counties. It is not currently paired with an overlay code. Local calls inside the 605 area can generally be placed with ten digits, and you do not need a leading 1 for domestic calls. Scroll on for a real-time clock, an area map, the cities and counties inside 605, its related area codes, and practical advice on 605 robocalls and caller-ID spoofing.
Cities covered by 605
Cities & neighborhoods
- Sioux Falls
- Rapid City
- Aberdeen
- Pierre
- Watertown
Counties
- Lincoln
- Pennington
- Brown
- Hughes
- Codington
Looking for the broader picture? See all South Dakota area codes.
Nearby & overlay area codes
Overlay codes (same area)
These share 605’s geography — a number in either code can be on the same street.
605 has no overlay code right now.
Neighboring codes
Codes for adjacent regions and metros.
Is a call from 605 a scam?
Area code 605 serves Sioux Falls and the surrounding area, so most calls are ordinary local and business traffic. As everywhere, spam and robocalls do use 605 numbers, frequently by spoofing a local-looking caller ID to boost pickup rates. The area code itself tells you nothing about who is really calling, so judge the call by what's said, not the number.
Red flags to watch for
- Pressure to act right now, or threats of arrest, fines, or service being cut off.
- Requests to pay with gift cards, wire transfer, crypto, or a payment app.
- Asking for passwords, one-time codes, your SSN, or full card/bank numbers.
- A robocall or recording, or a number that won’t let you call back.
When unsure, hang up and call the organization back on a number you look up yourself.
Calling a 605 number from abroad
Every 605 number is a US/Canada +1 number. From a mobile anywhere, the simplest approach is to dial it in international format:
+1 605 555-0142If your phone can’t dial the +, replace it with your country’s exit code, then 1, then the number:
- UK, Germany, France & most of Europe
00 1 605 555-0142 - Australia
0011 1 605 555-0142 - Japan
010 1 605 555-0142 - Mexico
00 1 605 555-0142
Within the US and Canada you don’t need any of this — just dial the ten digits 605 555-0142.
Reverse phone lookup
Check any US or Canada number to see whether it's a working line, which carrier it sits on, whether it's mobile, landline or VoIP, and roughly where it's registered.
Shows carrier, line type and location. Owner name isn't available here.
Results are for personal, informational use only and may not be used for employment, credit, housing or tenant-screening decisions.
Area code 605: frequently asked questions
Where is the 605 area code located?
The 605 area code is located in South Dakota, centered on Sioux Falls. It covers Lincoln, Pennington, Brown, Hughes, Codington and nearby communities including Sioux Falls, Rapid City, Aberdeen, Pierre, Watertown.
What time zone is 605 in?
Area code 605 is in the Central time zone (UTC-6 (CST) / UTC-5 (CDT)). You can see the exact current local time for Sioux Falls on the live clock above.
What cities use area code 605?
Cities and areas that use 605 include Sioux Falls, Rapid City, Aberdeen, Pierre, Watertown. Its primary city is Sioux Falls, SD.
Do I need to dial 1 before 605?
You generally do not need to dial a leading 1 for domestic calls to 605. Ten-digit dialing (the 605 code plus the seven-digit number) is the safest habit.
Is 605 a toll-free or scam number?
No — 605 is a normal geographic area code for Sioux Falls, not a toll-free code (toll-free codes are 800, 833, 844, 855, 866, 877 and 888). A 605 number is not inherently a scam, but the code can be spoofed. See the spam-call section above for how to tell.
What are the overlay area codes for 605?
Area code 605 does not currently have an overlay code; it is not layered on top of another code in the same area.