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Mostly, they are just an account number. Some of the digits, however, are "check digits." That is, they come from some mathematical formula being appled to some of the other digits. That makes it near impossible to simply make up a string of 16 digits that are a valid credit card number. Of course, the location of the check digits and the formula which generates them are carefully guarded secrets.

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Q: What do the 16 digits on a visa card mean?

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there are 16 digits on a visa card

16 digits.

There is only one card number in a visa debit card. It has 16 digits

16

Visa cards start with digital "4" and have a total of 16 digits Mustard's also contain a total of 16 digits but start with digital "51","52

It depends on the credit card. Visa and Mastercard both have 16 digits. American Express has 15.

starts with a 4 and it has 16 digits

It's the long number (16 digits) printed accross the centre of the card.

"There are several ways to tell if a credit card number is a Visa card number or not. First, Visa numbers always start with the number 4. They are also usually 13 or 16 digits in length."

A Visa and/or Mastercard will most likely have 16 digits. Most Visa's start with the number '4' and Mastercards with the number '5'. Gas cards, department store cards, debit cards can have anywhere from 7 digits to 16 digits.

usually 16 digits.. expiration date underneath it after your name.. and their may be a 3 digit security code on the bank of the card by the strip line.

The visa card number is the 16 digit number running across the middle of your card (4 groups of 4 digits). You may also find the number on your statement.

The number of digits on a credit card varies by the issuer, however, ISO standards for credit cards call for 15 or 16. Visa, Mastercard and Discover cards have 16 digits. American Express cards have 15 digits.

The 16 digit account number printed or embossed on the card.

There is no fixed number of digits for an ATM card number. It can differ from bank to bank. Some banks have 10 digits in their cards whereas some follow the international VISA standard and have 16 digits. As long as the card is able to serve its purpose of ATM transactions, the number of digits does not matter.

It would depend on the Credit Card type. Visa, Mastercard, and Discover are 16 digits American Express is 15 digits Diners Club is 14 digits

Usually, a visa card has 16 numbers.

Debit cards, credit cards have 16 digits. Usually a "plain" ATM (without the visa/mastercard logo) has fewer.

16

16, usually. Although I hope you're not going hacking with that. XD

16 Digits:)

Visa begins with 4 16 digits Master " " 5 " Discover " " 6 " Amex " " 3 15 digits

The number of digits in a valid credit card can change depending upon the type of card. Mastercard and VISA use a 16 digit system, while others including American Express use a 15 digit system.

Technically zero, as there are no numbers in the word "credit card". Otherwise, Visa, Discover, MasterCard, nearly all major companies have 16 digits. American Express on the other hand, have 15 digits.

no its the last 4 digits on the front and back of the card