What is the difference between a credit card number and a sub-account number, and what is the connection between the two?

1. Passbooks and cards are both carriers of bank accounts. The corresponding account number and card number are two identification marks. In principle, both the account number and the card number can be transferred, but because the account number is relatively fixed, the card number is Otherwise, once the magnetic strip is broken, lost, or the card needs to be replaced, the card number will change, so some banks also require an account number to be provided when transferring money.

2. The bank card number refers to the numbering program code on the hard card issued by each bank. There are unified regulations on the business number segments among various commercial banks. The first 6 digits of the card number represent the card issuing bank identification code, also called the BIN number. Different BIN numbers represent different bank card organizations and card levels.

3. A sub-account of a bank card is an account attached to the user's main bank card account: multiple currencies (RMB, US dollars, Hong Kong dollars, British pounds, etc.) can be opened in one bank card. Accounts with multiple deposit types (current deposits, lump sum withdrawals, zero deposits and lump sum withdrawals, principal deposits and interest withdrawals, notice deposits, etc.) realize the function of multiple accounts with one card, which facilitates the management of various functional sub-accounts by the customer's main account. In short, sub-accounts are multiple subordinate accounts opened and managed in the same card, such as current, fixed-term, local currency, foreign currency, etc. It can be understood that these sub-accounts are all in the account number of the user's savings card. What is the difference between China Merchants Credit Card number 3 and 6?

Which refers to the beginning of the card number? Usually the difference is the first six digits of the card number.

Cards starting with 6 are UnionPay cards, and cards starting with 3 are JCB cards. What are the characteristics of credit card numbers?

Credit cards are all 16 digits, with 4 digits in one group, and there are 4 groups in total.

At present, domestic credit cards generally have two settlement channels, one is a credit card that can only be settled by UnionPay, and the other is a credit card that is settled by both UnionPay and VISA***. The former is a credit card starting with 6229, and the latter is a credit card starting with 4047. Different settlement channels have different settlement costs. This cannot be experienced by domestic consumers, but it is obviously different when foreign exchange is required for consumption abroad. So some time ago VISA was having trouble with the use of credit cards overseas.

The other three sets of numbers should be the card issuing bank and serial number code.

Hope it is useful to you. What is the length and composition of a credit card number?

16 digits, the first 8 digits distinguish credit cards and credit cards, and the last 2 digits are check digits^_^There are only so many^_^ What are the dangers of leaking credit card numbers

It depends on the extent of your leakage. If both the card number and password are leaked, it is dangerous. If it is a credit card, only the card number and expiration date are leaked. In theory, it may be stolen, such as cloning your card and cracking your password

It is better to report the loss to insurance

Are there any differences between credit card numbers of various banks?

Usually the first four digits of a credit card (the first eight digits of a debit card) are the bank Identification code. For example, China Merchants Bank credit card numbers begin with 6225, and Minsheng Bank credit card numbers begin with 6226. What is the difference between China Merchants Bank credit card numbers 6225 and 3568?

Hello, China Merchants Bank credit cards, those starting with 6225 are generally UnionPay credit cards. Credit cards starting with 3568 are usually JCB credit cards.

For credit card consumption with organized logos (such as: VISA, MASTERCARD, JCB, American Express, UnionPay), choose the card swiping machine corresponding to the card swiping route to swipe the card, and there is no need to activate the additional card swiping function. When the card is swiped on UnionPay lines, the payment will be settled directly in RMB; when the card is swiped on international lines, the payment will be settled in US dollars. Since overseas purchases by credit card will be settled in U.S. dollars, if the consumption amount is non-U.S. dollars, conversion fees between the two currencies will be incurred. If the UnionPay line is used or the consumption amount is US dollars, no exchange settlement procedures will occur.

UnionPay is a bank card organization in China. Credit cards organized by UnionPay can be used to withdraw money across domestic banks and make purchases at merchant POS machines. Currently, many overseas countries such as Singapore and New Zealand also support UnionPay withdrawals and purchases. ; VISA, MasterCard, JCB and American Express are all overseas credit card organizations. Among them, VISA's authorized merchants are mainly concentrated in North America, Asia-Pacific and other regions; MasterCard's authorized merchants are mainly concentrated in Europe, Southeast Asia and other regions; JCB-Japan Credit Card Co., Ltd. Its special merchants are mainly concentrated in Japan; American Express has issued American Express cards in 130 countries and regions, providing distinguished card services to more than 7 million cardholders of 170,000 corporate customers around the world.

If you have any questions about other China Merchants Bank credit cards, please search "4008205555" in QQ business friends and add "China Merchants Bank Credit Card Center" as a friend; or search the number "cmb4008205555" in WeChat to follow "China Merchants Bank Credit Card Center" "Consultation, thank you for your attention and support to China Merchants Bank! What are the first digits of a credit card number that distinguish each bank?

The first 6 digits of a credit card number are called BIN, which can determine which bank it belongs to, but A bank will correspond to multiple 6-digit numbers.

In addition, the first number of the credit card number is 4, which is VISA card, and 5 is Master. 622126~622925 are UnionPay standard cards. Credit card numbers starting with 6 are China UnionPay single currency cards (or American Discover), credit card numbers starting with 4 are international brand VISA credit cards (the world's number one credit card organization), 5 are international brands MASTERCARD, and 3 are Japan JCB and American AMERICAN EXPRESS. Can you tell others your credit card number?

You can only tell others the card number, but you must not tell others the ID number, the VV2 code behind the card number, and the expiration date of the card number.