Knowledge credit card numbers
With credit card number. Is different each card that mean. A person's credit card number is not repeated in any credit card in the world. Because credit card number is unique identification number. Let we see about standard of credit card number is generate.
International Standards Organisation (ISO/IEC 7812-1:1993) and the American National Standards Institute (ANSI X4.13). Has define credit card numbering specification.
The first number of your credit card number is call MII (Major Industry Identifier), which represents the category of entity which issued your credit card. Different MII digits represent the following issuer categories:
MII Value | Issuer Category |
| 0 | ISO/TC 68 and other industry assignments |
| 1 | Airlines |
| 2 | Airlines and other industry assignments |
| 3 | Travel and entertainment (such as American Express and Diners Club) |
| 4 | Banking and financial (Visa) |
| 5 | Banking and financial (MasterCard) |
| 6 | Merchandizing and banking (Discover) |
| 7 | Petroleum |
| 8 | Telecommunications and other industry assignments |
| 9 | National assignment |
The last digit of your credit card number is a check digit, it taking for checksum. The algorithm used to arrive at the proper check digit is called the Luhn algorithm
Example Some of the better known issuer identifiers are listed in the table below:
Issuer | Identifier | Card Number Length |
| American Express | 34xxxx, 37xxxx | 15 |
| VISA | 4xxxxx | 13, 16 |
| MasterCard | 51xxxx-55xxxx | 16 |
| Discover | 6011xx | 16 |
| Diner's Club/Carte Blanche | 300xxx-305xxx, 36xxxx, 38xxxx | 14 |
Nowadays technology increased very rapidly in many ways to identify the theft. The work of the free credit card numbers is strictly for academic purpose and also used in ecommerce experiments. Use credit card numbers in honest manner. Some free credit card numbers are purposely given to get hold of people who use it for their benefit. When a person using others credit card numbers it is an unethical offence. Using a working free credit card is a punishable offence. Internet service provider can easily identify the involved person. Once identified police can arrest him and prison him for remaining life. So an average percentage of people started using credit cards in a good way.
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