Have you ever thought what credit card numbers are? They are far from being random.
So if you analyze information that your credit card number implies you should remember that the first digit of your credit card number is the Major Industry Identifier, that shows the category of entity which issued your credit card.
The first six digits are issuer identifier. The total number of possible issuers is a million (10 raised to the sixth power, or 1,000,000).
If you want to check validity of your credit card number you can use forms that are presented on some web resources.
Besides you can always download credit card number generator. As a rule, usual Credit card generator permits to work with a good deal of credit cards: VISA, Mastercard, Amex and others.