![]() The first digit of the card represents the category of industry (IIN) that issued your credit card. The check digit: The last digit is the check digit and is added to validate the authenticity of the credit card number (based on the Luhn algorithm).īank Identification Number (BIN) & Issuer Information Number (IIN) ranges.The account number: The number between the bank identification number and the check digit is 6 to 9 digits long and is used to identify the individual account number.This string of numbers identifies the issuer of the card. The bank identification number (BIN): The first six digits are the bank identification number (BIN) or issuer identification number (IIN).Anatomy of a Credit Card Number: 3 Parts to KnowĪ credit card number, for example 1234567812345678, consists of 3 parts: ![]() We thought some clarification was needed so we will describe below what a PAN number is made of, what BIN ranges refer to, and how you can use the Luhn algorithm (also know n as Mod 10 ) to validate a credit card using pen and paper. When dealing with cardholder data discovery projects, we often get a lot of questions about the anatomy of a credit card, things like the PAN number, BIN ranges, and Luhn checks.
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