Validating credit card numbers

type: Visa
number: 4929 5827 5418 1334
cvv: 558
exp: 06/20
name: JONATHAN OSWALD

Credit Card Generator

A valid credit card number has several fields and each of them has a meaning. For the technically inclined, this number complies to the ISO 7812 numbering standard. An contains a six-digit issuer identification number (IIN), an individual account identification number, and a single digit checksum.

The credit card numbers you generate on this page are completely random. When we say they are valid, we merely imply that they are a possible combination of characters which will validate when passed through the MOD 10 algorithm. You can also generate valid credit card numbers for specific Issuing Networks by utilising their particular prefixes. However, we do not provide you (obviously) with the correspondent verification code for these cards, as they are completely fake and made up randomly.

If you've ever found yourself trying to try a product online which required a credit card, even when you just want to take a look, you know why we made this. We believe there's no need to share such information with providers without the actual intent to buy stuff. Anyone can make a website with a form and require you to insert valuable and sensitive information which requires you to give up your privacy. This is a way to protect yourself in such situations.

The other reason we made this are programmers testing ecommerce websites, applications or other software. They usually need lots of fake data, and this is a very easy way to generate a bunch of valid credit card numbers in a split second. There's another tool for those times when you need to generate all other kinds of data.


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Validating Credit Card Numbers
Validating Credit Card Numbers

Fortunately, credit card numbers are created in a way that allows for some basic verification. This verification does not tell you if funds are available in the account and it certainly doesn't tell whether or not the person submitting the order is committing credit card fraud.Finally, you add both totals together and if the result is evenly divisible by 10, then the card has passed validation. Of course, this would be clearer with a bit of code and Listing 1 shows my IsCardNumberValid method. Listing 1: Validating a credit card.

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Validating credit card numbers in SAS. Heuristic Andrew
Validating credit card numbers in SAS. Heuristic Andrew

Major credit card issuing networks (including Visa, MasterCard, Discover, and American Express) allow simple credit card number validation using the Luhn Algorithm (also called the “modulus 10” or “mod 10” algorithm). The following code demonstrates an implementation in SAS. The code also validates the credit card number by length and by checking against a short of known test account numbers.

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Credit Card Validation
Credit Card Validation

And then validating those credit card numbers becomes important. Here is a combination of regular expression validation and standard JavaScript to check to see if a credit card number is a valid number. The code below will do that validation. However, note that this doesn't check to see if the specific credit card number has really been issued by the bank, or if the owner of the credit card has enough credit available, etc.

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