i.e., 18 => 1 + 8 = 9This will give us all the result in a single digit number.So, we get : 2,0,9,9,7,9,2,4Step 5: Now, Sum up all the single digits and all the digits left in the card number.i.e., 2+0+9+9+7+9+2+4 + 8+2+0+5+2+6+8 = 73Add the sum together. Now, this is not exactly the bank account number of a customer but the account number assigned to your credit account.Check Digit: And lastly, one last digit known as the “check digit” which is generated in such a way as to satisfy a certain condition.Here is the logic behind the condition that must be satisfied:Step 1: Let’s consider the card number as 1802909582961827Step 2: As of now, just consider first 15 digits i.e., 180290958296182|7Step 3: Now beginning from the left, start with the first number, take every second number and multiply it by 2 as shown here:Starting from the first i.e., 1 and taking every second number, we will get the following numbers: 1 0 9 9 8 9 1 21 * 2 = 20 * 2 = 09 * 2 = 189 * 2 = 188 * 2 = 169 * 2 = 181 * 2 = 22 * 2 = 4Step 4: Sum up the digits if the multiplication results in a 2 digit number.

This is known as “Major Industry Identifier” short for MII.Following is the list of Major Identity Identifier MII:ISO And Other Industries,Airlines,Airlines And Other Industries,Travels And Entertainment American Express Or Food Club,Banking And Finance VISA,Banking And Finance Mastercard,Banking And Merchandising,Petroleum,Telecommunications And Other Industries,National AssignmentIssuer Identification Number (IIN): The first six digits of the credit card number are known as the Issuer Identification Number short for IIN and this is to identify the institution that issued the card.The series followed by VISA cards starts from 4xx while that of Mastercard starts from 51–55 as the prefix.Account Number associated with Credit Card: Taking away the first 6 identifier digits, the following 6 to 9 digits constitutes unique bank account number. But, do you know these numbers are not a just random string of numbers rather it reveals a lot more information than you think.Ever wondered what does numbers on credit card actually represents? How that 16 digits identify the bank and the account from which your money needs to be paid to the billing party? A sample credit cardLet’s dive into these 16 digits that we just see a string of random numbers and is often wondering what numbers on credit card mean.Understanding numbers on Credit CardMajor Identity Identifier (MII): The first digit of the card represents the category of industry which issued your credit card.

The Logic Behind a 16 Digit Credit Card Numberīy Aamir Ansari A credit card or a debit card has a unique 16 digit number that everyone is aware of.

How do debit cards numbers work