b'C O M M U N I C A T I O N STelephone Service Incumbent Local Exchange Carriers: Challis, Clayton: Custer Telephone Co-op Mackay, Lost River: ATC Communications Stanley: MTE CommunicationsFIGURE 5. Switching LocationsInternet providers: Mobile Internet providers: Custer Telephone Co-opAT&T Rise BroadbandT-Mobile ATC Communications MTE Communications Nez Perce Systems Viasat HughesNetCUSTER County 349'