Abstract: Systems and methods are described herein for decoupling an account number from a physical or plastic card number (PCN), such as is typically used on credit, debit, gift cards, etc., by utilizing a virtual card number. In some aspects, an authorization request including a PCN may be received by a card conversion platform. A virtual card number, which the PCN may be registered to in a data store, may be determined. Based on comparing the authorization request with information associated with the PCN in the data store, the card conversion platform may determine to allow the authorization request. Upon allowing the authorization request, a modified authorization request, including the virtual card number, may be routed to a bank processing platform to approve or deny the authorization request based on a primary account associated with the virtual card number.