I have received several calls from whoever has this number.  When I answer the phone they don't speak, just hang on the line til I say "hello" about 3 times and hang up.  Then they call back immediately.  I believe it is a kid doing the calling because when I called the number back a recording said: "don't call this number".  I would like to know who it is so I can report this irritating behavior to his parents.  This goes on every few days.