it came up as National Group on my caller id. I do not answer my phone unless I recognize the #
 May 03rd, 2010
I just got a call from this number on my home phone. I did not pick up, but I almost did because the caller ID said "Service Message" which I thought was odd.

I am not sure who it was. From what I am reading elsewhere it is a credit card company looking to offer "reduced rates" on your credit card.
 Apr 27th, 2010