Class A

• Alliance Communications Cooperative
• Golden West Telecommunications Coop  
• Interstate Telecommunications Cooperative
• James Valley Telecommunications
• Midstate Communications
• Roberts County Telephone Cooperative
• Santel Communications
• TrioTel Communications, Inc.
• Valley Telecommunications Cooperative
• Venture Communications Cooperative
• West River Cooperative Telephone Company
• West River Telecommunications Cooperative

Class B

• Armour Telephone Company (Golden West Telecommunications subsidiary)
• Bridgewater-Canistota (Golden West Telecommunications subsidiary)
• Hills Telephone Company (Alliance Communications subsidiary)
• Kadoka Telephone (Golden West Telecommunications subsidiary)
• RC Communications (Roberts County Telephone Coop subsidiary)
• Sioux Valley Telephone (Golden West Telecommunications subsidiary)
• Splitrock Properties (Alliance Communications subsidiary)
• Stockholm-Strandburg (Interstate Telecommunications subsidiary)
• Union Telephone (Golden West Telecommunications subsidiary)
• Vivian Telephone Company (Golden West Telecommunications subsidiary)

Class C

• Beresford Municipal Telephone
• Cheyenne River Sioux Tribe Telephone Authority
• Faith Municipal Telephone
• Fort Randall Telephone Company
• Kennebec Telephone Company, Inc.
• Knology Community Telephone, Inc.
• Long Lines
• Mount Rushmore Telephone Company
• Swiftel Communications
• Western Telephone Company