This number called my job when I answered they hung up. I called back and a recording asked me if I wanted to be put on their do not call list press any key. It didn't say who the number belonged to.

My phone rang at 2:30 this morning.  This was the number.  Noone responded when I said "hello" and when I called it back noone answered.  The outgoing voicemail message said that no voicemail had been set up for that number.