What Are Common Methods for Card Number Validation?
Here are some of the common methods used for card number validation:
Luhn Algorithm: A simple checksum formula used to validate a variety of identification numbers, primarily credit card numbers. BIN Lookup: This involves checking the Bank Identification Number (the first 6 digits) to identify the issuing bank. Regular Expressions: These are used to check the format of the card number based on known patterns for different card issuers.