ZIP Code 57751
Keystone, South Dakota · Pennington County
No25568
Zip57751
TypeSTANDARD
Decommissioned0
Primary CityKeystone
Acceptable Cities—
Unacceptable Cities—
StateSD
LstateSouth Dakota
CountyPennington County
TimezoneAmerica/Denver
Area Codes605
World RegionNA
CountryUS
Latitude43,89
Longitude-103,42