NAICS 517919 — All Other Telecommunications 
BEA sector: Wired telecommunications carriers
Activity: Dial-up Internet service providers, using client-supplied telecommunications connections
Activity: Earth stations (except satellite telecommunication carriers)
Activity: Internet service providers, using client-supplied telecommunications (e.g., dial-up ISPs)
Activity: On-line access service providers, using client-supplied telecommunications (e.g., dial-up ISPs)
Activity: Radar station operations
Activity: Satellite telemetry operations on a contract or fee basis
Activity: Satellite tracking stations
Activity: Telemetry and tracking system operations on a contract or fee basis
Activity: VoIP service providers, using client-supplied telecommunications connections