The CreditCard Validator will help you tell: (1) if a credit card number is valid (2) which credit card vendor handles that number. It validates the prefix and the checkdigit. It does *not* contact the credit card company.

The CreditCard Validator will help you tell: (1) if a credit card number is valid (2) which credit card vendor handles that number. It validates the prefix and the checkdigit. It does *not* contact the credit card company.

CardCheck verifies credit card numbers to ensure they are genuine. CardCheck supports: Visa, MasterCard, American Express, Diners Club and Discover cards. Cards can be checked individually or in batches.