I received call from this number this morning as well. I played along for a little bit. He kept saying they do not ask any question that would violate security of the card. Then, when he was asked for my last 4 SS # digits, I gave him all kinds of back talk. Didn't care, I called my CC Company and asked for a new number just in case. Taking no chances.
I got a call from this number today at 644 pm. Several seconds of silence was all that was left on my answering machine. Caller I.D. said "incoming call". How lame is that?!