Credit card numbers first digits may also be used to identify the credit cards major industry. These issuers are companies in which the credit card came from such as Visa, MasterCard, JCB, Discover. It consist of prefix digit Major Industry Identifier, 6-digit issuer identification number or IIN, 7-digit personal account number. ![]() Generate Valid Test Credit Card Numbers for Data Testing and Verification PurposesĪ credit card number consist of complex formulation of ISO/IEC 7812 which has 2 different parts - the numbering system and application and registration procedures.
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