Elk Point* Elkton Ellis* Ellsworth AFB / Mount Vernon / Fort Randall Telephone Company Valley Telecommunications Vivian Telephone / /
NaturalFeature
Golden West Telecommunications Qwest Corporation Qwest Corporation West River / Inc. Black Hills / /
ProvinceOrState
Golden West Communications Roberts County / South Dakota / Inc. Qwest Corporation Roberts County / Inc. Roberts County / Nebraska / Flat Camp Crook Canistota Canning* Canova Canton / /