I received a call from above number.  Identified themselves as my MasterCard provider.  I questioned the validity of the call and contacted Capital One MasterCard.  The call did not originate from MasterCard and has no affiliation with MasterCard.  They are attempting to identify what credit cards you have.  Claim they can lower fees.  WARNING: DO NOT GIVE THEM ANY PERSONAL INFORMATION!!!  I was asked to report them to BBB.