Card Network Starting Digit(s) Typical Length Visa 4 13 or 16 digits Mastercard 2–5 (e. This initial segment, known as the Major Industry Identifier, instantly tells payment systems which network the card operates on.
Ensuring Safe Debit Card Number Use During Online Shopping
This mathematical safeguard helps detect typos or transmission errors, ensuring the number entered is at least structurally valid before it proceeds to verification. The Account Number and Check Digit Following the IIN is the unique account number, which corresponds specifically to your individual banking relationship.
Protecting Your Financial Identity. The Issuer Identification Number (IIN) Extending from the MII, the Issuer Identification Number (often the 6 to 8 following digits) identifies the specific bank or financial institution that issued the card.
Ensuring Safe Debit Card Number Use During Online Shopping
Every transaction you make online or in person starts with a sequence of numbers that quietly authorizes the movement of funds. Never share the number verbally or in writing unless you have initiated the contact with a trusted party.
More About Debit card number
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