I get calls from this number.  No one talks but there is background noise.  How can I stop them?

On Sep 09,2008 I got call from a Skype caller. Caller # was 416=360-4084.Voice was very clear. I'm in Calgary Alberta Canada caller was in New York.

Just answered a call from this number. A young woman said she was calling from some polling or research service or another. I didn't hear because I interrupted to ask that they please remove my number from their calling list.

She replied, "We're not selling anything."

I said, "Yes. Please remove my number from your list," and hung up.

Called Mar 3, left no message shown as unknown caller

I just got my notorious call from someone named Didi asking what time my office closed

Called 3 times today, at 10:18am, 1:03pm, and 3:19pm