I have been receiving prank calls from this number regularly and do not give my number out, so I am guessing that others are also being pranked by the same number.  The first time they called, they spoke in a muffled voice and thereafter, they would not speak -so, after the second call, i stopped answering.  They still regularly call and will be put on my 'blocked' list soon -but i am curious to see if anyone else has had similar issues.