Who called from 2093493802

This number call about 2:30am after I took a sleeping pill for some well needed sleep. Maybe I'll get some sleep tonight.

Picked up phone, said hello several times. silence.  Hung up after 11 seconds of silence.

This number comes up as unknown. They started calling at 7:30 AM and would hang up when the answering machine came on then they would call again. This happened over and over again for about 10 minutes.

received a call from this number at 2:13 am.  Scared me to death!  When I answered, there was a click and then no answer.

I've received this call before, with an immediate hangup.
Caller ID shows "Merced   CA"