Who called from 8013485214

This caller calls several times a day.

The number has called me twice in a row and no one says anything. I leave the line open and on speaker phone until the call cuts off.

4 calls in less then 12 hours, no one there, finally just blocked the number on my iPhone.

This number has called me 3 times in a row and no one says anything

Called several times and they know my name. They claim they are my ex boyfriend.