I received the call today, 4/28/12 at 9:53am CST. I didn't answer and they left no message. I was about to call back, but decided to check the web to see what the public had to say. This confirms what I thought. Must be a scam or something. thanks.
Just got their call, didn't answer, looked them up and it's a robot call to see when you answer your phone and to see if it's a working number.
We disconnected the answering machine last month. When they call it's ring no answer.
It eliminated 90% of these calls. Now I get one or two a week.
They are invisible to us so we just became invisible them because we don't want to give up the house line.