I receive a call from this number immediately after getting off the phone with Transunion. I have been dealing with this very issue of people trying to fraudulently obtain my information. The Transunion 800 number I had called was 1-800-916-8800. This department is apparently outsourced to some part of southern Asia, such as India. It is entirely possible that the scammers have a way of monitoring calls to this number. After receiving the call from 800-423-4343, one hears an automated voice message informing you that you have reached 'AT&T Universal Card.' You are then instructed to either say or enter your credit card number. If you are told your number is 'incorrect,' you are then instructed to enter your full Social Security number. After this, the automation tells you that your call is important, but 'due to high volume of calls,' you will have to wait. Remember, these people have called you. Obviously a scam--but a rather sophisticated one. Should report this to federal law enforcement.