Called a few times. Never leaves a message. We could not answer when they have called. No clue as to who they are...

I receive a call from this number on a daily basis, sometimes more than once a day. When I answer the phone there is no response and eventually a click. I also received a rapid busy signal when I call back.

Called 3 times in ten minutes, but left no message. Called back and it was a fast busy signal.