Scam number.  I called it back from a blocked number.  After hearing a looped recording that said "Please hold while we connect you to the other line"  I finally was connected to someone who said nothing.  I realized someone was on the other line being quiet when I heard a slight clicking sound.  I then said "Are you going to say something or just stay silent?"  Still no answer, just for fun I pretended to be talking to someone else and saud "Okay, start tracing the call."  Immediately after saying that the line was disconnected....