The 2021 US visa credit card number is 16 digits. Digits 1-6 represent the BIN NO of the card issuing bank, digits 7-12 are the serial number of the user's card, and digit 13 can distinguish the primary and secondary cards. If it is 0, it represents the primary card, and if it is 1-9, it represents the secondary card. , the 14th digit represents the date the card statement was issued, the 15th digit represents the card number. If it is lost and needs to be reissued, 1 will be added after the card is reissued, and the 16th digit is the verification code.
1. 2021 US visa credit card number.
The VISA card number is a sixteen-digit embossed card number, consisting of four groups. The first card number is fixed at four. Guangfa Bank VISA True Love Card Gold Card Format: 4063 6688 8888 8888. China Merchants Bank ELLE co-branded credit card VISA white format: 4392 2688 8888 8888. Industrial Bank VISA standard dual currency platinum credit card format: 4868 6188 8888 8888. ICBC VISA Peony Travel Alliance Card format: 4270 3088 8888 8888. CCB VISA Dragon Truck Card format: 4367 4588 8888 8888.
2. The role of credit card security codes
In the early years, credit card security codes were mainly used for overseas website purchases. When shopping on overseas websites, you do not need to provide a password. You only need to provide the credit card number, expiration date and security code to complete the transaction. In recent years, some merchants in China have begun to use security codes instead of passwords for payment. For example, JD.com’s online payment system, where most air tickets and hotel reservations are also transacted through security codes.
To sum up, how to prevent the user's credit card security code from being leaked? First of all, when swiping the card outside, be careful not to let others easily see the security code of the user's credit card. If you are afraid that the security code will be leaked, You can use tape to block the security code. Secondly, if you use a credit card security code for online shopping, remember to clear the credit card information automatically saved on the website.