Credit card payment detail in Customer master setup

Hi,

If a customer supposed to pay the amount via credit card payment, so they need to do the setup in customer master screen. They add credit card detail under Payment Tab in customer.

So i want to check if the credit card payment is setup to the customer or not. how i can track the detail in db table.

Because i have to extract one report for couple OU. So it take more to check in front end.

Please let me know the table involved in customer master which used to store the credit card payment detail.

Thanks
Renish