Yeah, although that number isn't the original card number, it's a "Device Account Number" which is unique to a specific device. I believe it's a pretty useless

Yeah, although that number isn't the original card number, it's a "Device Account Number" which is unique to a specific device. I believe it's a pretty useless number to know. It can only be used in combination with a cryptographic challenge-response which verifies the particular device and matches the "Device Account Number".