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What is the card number of the credit card?
The current 16 digit credit card number is an international standard. The first 6 digits are BIN, which is allocated by the international card organization. The first four digits of the credit card number are VISA card, and the fifth digit is Master card. 622 126~622925 is a unionpay standard card. 6 starts with China UnionPay single currency card (or American discover), the credit card number 4 starts with the international brand VISA credit card (the world's first credit card organization), 5 starts with the international brand MASTERCARD, and 3 starts with Japan JCB and American Express. The 7th bit-15 bits are allocated according to their own needs, and 16 bits are parity bits. Other non-16-digit card numbers are allocated by the bank.

The credit card number is a prominent 16 digit, which is located under the card number 1/3. Below the card number is the expiration date, separated by a "/"symbol, and at the bottom is the cardholder's name. As shown in the figure below: