Next, we need to calculate the CVV, the 3-digit number that gets printed on the back of the card. Nowdays there are cards issued by non-banks, like bank-in-an-app services. The Institution ID is the ID of the Bank or Next is the name that is printed on the card. The Expiration Date is a 4 digit number in theįormat of MMYY which means month as 2 digits, and year, also 2 digits. The correct card number is 4000340000000504 Generating the card recordsįor printing on the plastic card, this card number is split in 4 digits groups, with a blank space as a separator. The algorithm makes the Luhn check of the first 15 digits and appends the calculated digit, so This last digit is beingĬalculated with Luhn algorithm. To make calculate a correct card number, we call a function that takes the first 15 characters of this card number, so without the last digit. If you just press the "Generate Cards" button, an initial card number is How card data generation works Calculating the correct card numberįirst Step is to calculate the card number based on an in initial value or a prefix or BIN.
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