What Is A Credit Card Number? The Meaning of Each Digit
https://wallethub.com/edu/cc/what-is-a-credit-card-number/44066
WebJul 6, 2023 · Each credit card has a unique string of numbers, but the first one or two digits can help you identify the payment network. For example, Mastercard's first digit is the number 5 and American Express card numbers start with 3. When combined with the first digit, the next 5 digits of a credit card number identify the card issuer for any given Visa.
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