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It depends on the credit card. There can be up to 19 digits in a credit card; most issuing agencies do not use the full 19 (16 is pretty typical; American Express uses 15 and Diners Club uses 14). The first digit specifies the type of card; the first six specify the issuing institution. The last digit is a "check digit" calculated based on the others, so someone who tries to make up a number at random will get it wrong nine times out of ten.
Other than that, there really aren't any restrictions on what numbers are "possible" (note that "possible" is not the same as "valid" ... if you make up an issuer or account number that doesn't exist, the card will not go through even though it technically meets the specifications). POS terminals and data communications are cheap enough now that it's fairly common for transactions to be authorized at the time of purchase rather than later in a batch process, as was usually done 30 or 40 years ago.
What else can I help you with?
Is 4142 a debit card number or credit card number?
it's a credit card number.
Is it possible to identify the credit card provider by the last 4 digits of the credit card number?
Yes, but it's the first 4 digits, not the last 4.
Is the credit card number the same as the account number?
No, The credit card number is the long string of numbers embossed on the card. The account number is not shown on the credit card - it will be on your statements.
How do you know where the credit card number is on my credit card number?
This question makes no sense. The credit card number is printed on the card in raised numbers across the front.
What is the most used credit card number?
Why do You want a most used credit card number...people will probably NEVER give you a most use credit card number, sorry :\
Is it possible to put your credit card number on club penguin insted of a gift card number?
no why do you ask because i wanted to know
Is it possible to pay a deductible with a credit card?
Yes, it is possible to pay a deductible with a credit card.
Is it possible to pay for the appraisal with a credit card?
Yes, it is possible to pay for the appraisal with a credit card.
Does any one have a credit card number?
Yes, everyone who has a credit card has a credit card number.
Is 4142 a debit card number or credit card number?
it's a credit card number.
Is it possible to identify the credit card provider by the last 4 digits of the credit card number?
Yes, but it's the first 4 digits, not the last 4.
Is it possible to return money to a credit card?
Yes, it is possible to return money to a credit card by making a payment to the card issuer.
Is the credit card number the same as the account number?
No, The credit card number is the long string of numbers embossed on the card. The account number is not shown on the credit card - it will be on your statements.
How do you change the credit card number on a nook?
how do i change the credit card # on my nook
How do you know where the credit card number is on my credit card number?
This question makes no sense. The credit card number is printed on the card in raised numbers across the front.
Is it possible to receive a refund directly to a credit card?
Yes, it is possible to receive a refund directly to a credit card.
Is it possible to transfer a business credit card balance to a personal credit card?
Yes, it is possible to transfer a business credit card balance to a personal credit card, but it is important to check with both credit card companies for their specific policies and any associated fees.
