What is BIN Number?

The term "BIN number" refers to the Bank Identification Number. It's a term used in the credit and debit card industry to describe the first six digits of a card number. These digits identify the financial institution that issued the card.

A typical card number has between 13 and 19 digits and is known as the card account number (PAN). The first six digits (the BIN number) provide information about the financial institution that issued the card, while the remaining digits are unique to the cardholder and the specific account.

In practice, a full card number might look like this (fictitious):

• 1234 5678 9012 3456

Where "123456" would be the BIN number. Each card brand has a range of BIN numbers. For example, Visa cards traditionally began with a "4", while MasterCards usually began with a "5". However, over time and with the issuance of new cards, these ranges have evolved.

BIN Number in eCommerce

The BIN is an essential part in e-commerce and card payment processing systems, serving several purposes:

• Transaction Authorization: It helps card networks and merchants route transactions to the correct financial institution for authorization.
• Fraud Detection: It can be used in anti-fraud systems to identify patterns of suspicious transactions based on card issuance.
• Card Identification: It allows merchants and payment processors to identify the card type (e.g., Visa, MasterCard, American Express) and, in some cases, the product type (e.g., credit card, debit card, gift card).
• Card Validation: E-commerce systems often use the BIN number to validate that the card number entered by a customer corresponds to a real issuing bank.
• Fee and Promotion Policies: Merchants can use the BIN number to apply specific fee policies or promotions based on the issuing institution or card type.

It is important to note that while the BIN number can provide information about the issuing institution, it does not contain personal information about the cardholder. Systems that use BIN numbers must comply with industry regulations and security standards, such as the Payment Card Industry Data Security Standard (PCI DSS), to protect card information and prevent fraud.