The Structure of a Credit Card What do the credit card numbers mean? def cc_type (cc_number): """ Function determines type of CC by the given number. Merriam Park: Anatomy of Credit Card Numbers, Regular Expressions: Finding or Verifying Credit Card Numbers. Look at the first digit of the credit card number, which identifies the broad category of the industry that issued the card. Credit card bin numbers are the first 6 digits of a card number. The most common first digits are 1 and 2 for airlines, 3 for travel and entertainment, 4 and 5 for banking and financial, 6 for merchandising and banking, 7 for petroleum and 8 for telecommunications. In any credit card number, the first six digits are the BIN or IIN. The numbers 5555-5555-444 are the individual account number and the last 4 is the check digit. Do NOT give your credit card information to anyone asking for it through an unsecured channel (for example by email). You can use getCreditCardType() like this: Keep in mind that the getCreditCardType() function looks at only the first few digits, and so works both when there are dashes in the account number and when there are not. The content of this site is licensed under Creative Commons. It must start with: 4 for Visa cards 5 for Master cards; 37 for American Express cards; 6 for Discover cards MasterCards begin with a number from 51 to 55. Visa cards always start with a four, while MasterCard credit cards start with numbers between 51 and 55. There is a standard called ISO/IEC 7812 that specifies the format for identification numbers on credit cards as well as other card-based identification numbers. Starting at the last digit and moving backwards, you add up every other digit. My father gave me his credit card # for my college apps i don't know if its a Master card or a visa credit card i all know is the number which i will not say and that its a "Bank of America credit debit card". Using the DOM Level 2 addEventListener() method, a DOMContentLoaded event handler sets up the rest of the event handlers for the page. GitHub updates the interface a bit faster, waiting until it has enough information to figure out the credit card type. For obvious reasons, just any sixteen digits will not work, they follow pattern.
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