MASTER and VISA are two major credit card organizations in the world. There is no obvious difference in the financial functions of credit cards, but the rights and interests of each card organization are different. MASTER credit card organization starts with 5, and VISA credit card organization starts with 4. You can complete the credit card APPlication online through Bank of China Mobile Banking, official website (), official account of credit card WeChat, colorful life app and online banking. If there are Bank of China outlets nearby, you can also bring valid certificates such as ID cards, as well as proof of economic sources and income, and fill out an application form at the Bank of China outlets to apply.
The above contents are for your reference. Please refer to the actual business regulations.
What is a credit card?
A credit card is a series of numbers printed on the front of a credit card, usually 16 digits.
The current 16 bit is an international standard, and the first 6 bits are BIN, which is allocated by the international card organization. The first one is VISA card, the fifth one is Master, and 622 126 ~ 622925 is unionpay standard card. 6 starts with China UnionPay single currency card (or American discover), 4 starts with international brand VISA credit card (the first credit card organization in the world), 5 starts with international brand MASTERCARD, and 3 starts with Japanese JCB and AMERICANEXPRESS.
The 7th bit-15 bits are allocated according to their own needs, and 16 bits are parity bits.
Other non-16 bits are allocated by the bank.
What number does China Bank credit card begin with?
Different card organizations are different. Generally, VISA organization starts with 4, MasterCard organization with 5 and UnionPay organization with 62. Please refer to the card display for details.
The above contents are for your reference. Please refer to the actual business regulations.
How about a credit card at first?
The number at the beginning of a credit card is determined by the credit card bank, whether it is four or five digits.
According to Article 7 of the Measures for the Supervision and Administration of Credit Card Business of Commercial Banks, credit cards refer to all kinds of media that record the relevant information of cardholders' accounts, have the functions of bank credit line and overdraft, and provide relevant banking services for cardholders.
Analyze the meaning of each number of credit card and its arrangement order
1, credit card basics
Credit consists of a series of 16 digits. The card starting with 4 is VISA, the card starting with 5 is MasterCard, JCB card and American Express card usually start with 3, and the most common card of China UnionPay starts with 62.
2, the meaning of credit card number arrangement
Taking the Great Wall Global Connect VISA chip credit card of China Bank as an example, we dissect the digital meaning of the credit card, with one * *16 digits, four digits in a group and one * * * in four groups. So what does this arrangement mean? Let's look at the table below:
In this table, we can clearly see that the 1-6 bit in the bright yellow field is the identification code of the issuing bank, which is the familiar BIN code; Huang Tu domain 7- 15 is a bank account (except American Express, the same below), and its meaning is defined by the issuing bank. The definition standards of each bank are different, so I won't elaborate on them one by one. The 16 bit of the grass green field is the check code, which is called checkdigit in English. It is used to verify the validity. I'll talk about how to calculate this number later.
3. Issuer identification code (BIN code)
Let's first understand what is the issuer identification code (BIN code). Many card friends know that this is the 6-digit number assigned to the bank by the card organization, but how it came from may not be clear to many people.
The first six digits are called BIN, which is the abbreviation of English BankIdentificationNumber; This set of numbers, also known as IIN, is the abbreviation of the English IssueIdentificationNumber (IssueIdentificationNumber), which is formulated according to the ISO/IEC78 12 document. These numbers can help cardholders and merchants identify the issuer of bank cards. Banks that meet the ISO/IEC78 12 standard usually have 16 digits, which can reach 19 digits at the longest. The standard structure is shown in table 1.
According to ISO/IEC78 12, the first one is strictly MII MII-MajorIndustryIdentifier, which is the main industry identifier, and can help us to identify the industry to which the card belongs conveniently. For example, numbers starting with 3 are allocated to tourism, entertainment and banking/finance, numbers starting with 4 and 5 are fully allocated to banking/finance, and numbers starting with 6 are allocated to business and banking/finance. The 2-6 digits of are called IIN, which is the identification number of the issuer. Of course, we are talking about bank cards here, so we don't need to be so detailed. Interested friends can go online to find information themselves. For simplicity, we still use BIN code to address the first 6 digits of the bank card.
IIN database and its members are managed by American National Standards Institute (ANSI) and updated once a month. The American National Standards Institute is responsible for assigning IIN ranges to distribution networks. UnionPay will apply to the organization for an international standard card number starting with 62. There are many websites that provide BIN code queries. As long as we enter the first 6 digits of the card, we can know our issuing country and bank and the card type. Here is to introduce a BIN code query website for everyone. Interested friends may wish to check their card types. Of course, the results are for reference only.
4.No. 7- 15.
The 7th-15th position of a credit card, that is, the bank account, is defined by the bank itself, and the rules of each bank are different. You just need to understand that this is your own bank account. Here, I want to say a little more about the Great Wall Global Pass Card of China Bank. This set of accounts of Great Wall Card is very interesting. He defined 7-8 digits as the identification number of provincial card issuing banks, such as 3 1 in Shanghai, 32 in Jiangsu and so on. The remaining 9- 15 digits are your account number, and the last digit is the check code. Let's take a look at Table 2 below to understand the structure and characteristics of the Great Wall Card of China Bank:
By the way, I will provide you with the identification number of the provincial card issuer of Great Wall Global Card:
Beijing 1 1, Tianjin 12, Hebei 13, Shanxi 14, Inner Mongolia Autonomous Region 15, Liaoning 2 1, Jilin 22, Heilongjiang 23 and Shanghai 3/. Guangdong 44, Shenzhen 48, Guangxi 45, Hainan 46, Chongqing 50, Sichuan 5 1, Guizhou 52, Yunnan 53, 54, Shaanxi 6 1, Gansu 52, Qinghai 53, Ningxia 64 and Xinjiang 65.
Interested friends may wish to compare the Great Wall card in their hands.
5, the last check code
Now there is only the last check code of the card, but before introducing the sixteenth check code, let's learn a proper term-Luhn algorithm.
Luhnalgorithm, also known as "Modulo 10 algorithm" (MODU 10 or Mod 10) algorithm, is a simple checksum algorithm, which is generally used to verify identity codes, such as the identification code of the issuing bank, the international mobile equipment identification code (IMEI), the national provider identification code of the United States or the Canadian social security number. Invented by IBM scientist HansPeterLuhn,/kloc-0 applied for a patent on June 6, 954, and granted on August 23, 960, with the U.S. patent number of 2,950,048.
This algorithm has been widely used, such as ISO/IEC78 12- 1 standard related to our credit card. It is designed to prevent accidental mistakes, not malicious attacks. Many credit cards and many government identification numbers use this algorithm to extract valid numbers from a series of random numbers, but China UnionPay does not use this algorithm, and it is still unknown what algorithm to use.
Let's use the truth in this paper to understand the characteristics of this algorithm and see how the last check code, that is, check code 9, is calculated.
Calculation steps:
1. The third column, starting from the parity bit, from right to left, multiplies the even number by 2, and then adds the single digits of the two digits to the ten digits;
2. In the fourth column, the odd digits of the obtained number and the original number string are added to obtain 71;
3. The unit number of the result is 1.
4. Subtract 1 0 from1to get 9, which is the last check code in the real card.
Another algorithm is to calculate the sum of 7 1 according to the above step 1-2, and then:
1. Result 7 1 times 9 to get 639.
2. The single digit of the result is 9, which is the check code.
Now we know that the last check code of the credit card is calculated by Luhn algorithm, and its function is to verify the validity of the card, instead of randomly generating a number in the bank computer and printing it out. Some popular online credit code generators also use this algorithm to generate credit codes. Although this algorithm is effective, it is still a fake card and cannot be used for real online transactions.
What's the difference between a credit card starting with 4 and a credit card starting with 6?
The credit card institutions that represent cooperation are different. Generally, VISA starts with 4, and UnionPay starts with 6.
At present, the code of UnionPay card starts with "62", MasterCard starts with "5" and VISA starts with "4". At present, the dual-label cards on the market have the logos of UnionPay and international card organizations at the same time, but they use the logo codes of international card organizations, such as MasterCard and VISA.
Bank card clearing will come into contact with a lot of financial information of cardholders, merchants, acquirers and card issuers, which is related to the inter-bank clearing order and the stable operation of the payment system, but not everyone can do it. Therefore, not only in China, but also in all countries, the qualification requirements for bank card clearing institutions are very high, so the number of card organizations is so small that you can count them with your fingers.
Previously, the State Council decided to stipulate the conditions for applying to become a bank card clearing institution: the registered capital is not less than 654.38 billion yuan; At least one major investor who meets the prescribed conditions and holds more than 20% of the shares, or multiple major investors who meet the prescribed conditions and hold more than 25% of the shares; And should be engaged in banking, payment or clearing business for more than 5 years before applying.
So much for the introduction of credit card 4.