Who called from 8013856798

Calls, I answered, nothing there but dead air.  WTF?

Caller ID says Unknown Name.  I answered the call but nobody seems to be on the line.

Calls at least once daily on weekdays.  Dead air. No message left. Caller ID identifies caller as UTAH CALL. Called number back several times in attempt to identify caller.  Message: "The number you have dialed is not in service." Probably VoIP-type call so if you return the call the caller cannot be identified. For this reason I suspect calls are coming from a collection agency.

Someone supposedly from Dish Satellite.

I didn't answer and they did not leave a message