I've been receiving calls twice a day for the last month from this number.  When answered, there's no one there.  Its extremely annoying especially since the calls are coming to my business phone.

Similarly: I've been receiving calls once a day for a week from this number.  When answered, there's no one there.  Annoying!

I called back and got a robot saying please press any key to be removed from this list.  I pressed a key.  We'll see...