This U.S. industry comprises establishments primarily engaged in providing specialized telecommunications services, such as satellite tracking, communications telemetry, and radar station operation. This industry also includes establishments primarily engaged in providing satellite terminal stations and associated facilities connected with one or more terrestrial systems and capable of transmitting telecommunications to, and receiving telecommunications from, satellite systems. Establishments providing Internet services or voice over Internet protocol (VoIP) services via client-supplied telecommunications connections are also included in this industry.

• Dial-up Internet service providers
• VoIP service providers, using client-supplied telecommunications connections
• Internet service providers using client-supplied telecommunications connections (e.g., dial-up ISPs)
• Satellite tracking stations

• Dial-up Internet service providers, using client-supplied telecommunications connections
• Earth stations (except satellite telecommunication carriers)
• Internet service providers, using client-supplied telecommunications (e.g., dial-up ISPs)
• On-line access service providers, using client-supplied telecommunications (e.g., dial-up ISPs)
• Radar station operations
• Satellite telemetry operations on a contract or fee basis
• Satellite tracking stations
• Telemetry and tracking system operations on a contract or fee basis
• VoIP service providers, using client-supplied telecommunications connections