Who called from 5742069096

Several calls from this number.  Always hang-up, no message.  No name on caller id.

This number calls all the time, all hours of the day and night.  No name is given so we let it go to voicemail, no message is ever left.  When they called 3 times before 9am one day, that was it, we blocked them.  Caller ID tells me they still keep trying, you'd think they would get the hint.