Keystone, South Dakota Phone Lookup

Q: How do I look up a phone number in Keystone, South Dakota?

Enter the full 10-digit number into the search box and click Search. 411FCC returns the owner's name, location, carrier, and line type. The lookup covers all 1 area code serving Keystone.

Q: What types of phone numbers are in Keystone?

Keystone has both wireless and landline numbers. 411FCC results identify the line type and carrier for any number searched.

Find the owner of any phone number in Keystone, South Dakota.

What Phone Numbers Are in Keystone, South Dakota?

Looking up a phone number in Keystone, South Dakota? Enter any 10-digit phone number in the search box above to find the owner's name, address, and carrier information. Keystone is served by 1 area code and has 1 active phone prefixes.

1 Area Code

1 Phone Prefixes

Area Codes Serving Keystone

Phone numbers in Keystone, South Dakota use the following area code: 605.

Data current as of March 2026

Nearby Cities in South Dakota

Other cities in South Dakota that share area codes with Keystone:

Keystone at a Glance

336 Population

38.1 Median Age

$64,702 Median Income

232 Housing Units

70% Homeownership

Demographics

White 84.5%
Black 0%
Hispanic 23.8%
Asian 0.6%
Other 0%

Financial Profile

$70,941 Avg. Income per Return

$35,961 Avg. Wages per Return

560 Tax Returns Filed

1 ZIP Codes

Frequently Asked Questions

What Area Codes Serve Keystone, South Dakota?

Phone numbers in Keystone, South Dakota use 1 area code: 605. These area codes are shared with other cities in the region. Keystone has 1 active phone prefixes assigned to local carriers. If you received a call from one of these area codes, enter the full 10-digit number into the search box above to find out who called. The area code alone tells you the general geographic region, but a full reverse phone lookup on 411FCC reveals the specific owner, carrier, and line type associated with the number.

How Do I Look Up a Phone Number in Keystone, South Dakota?

To look up any phone number in Keystone, enter the full 10-digit number into the search box at the top of this page and click Search. 411FCC returns available information about the number including the registered owner's name, location, phone carrier, and whether it is a wireless cell phone, landline, or VoIP line. The lookup covers all 1 area code serving Keystone and works for numbers from every carrier in the area. Results appear within seconds. 411FCC has maintained its phone number database since 2003.

What Types of Phone Numbers Are in Keystone?

Keystone, South Dakota has both wireless and landline phone numbers. When you search a phone number on 411FCC, the results identify the line type and carrier, which helps distinguish personal cell phones from business landlines and identify VoIP numbers commonly used by automated calling systems.