It can be printed or embossed on the "plastic". Both on its front and back sides. Banks apply the combination even to "instant" payment instruments, which are made in a few minutes and issued to clients when visiting the office. You do not have to wait 2-3 days for their release. Nevertheless, they have all the necessary details for payments and transfers.
Banks do not recommend disclosing the number on the plastic card to strangers. However, without other data, this information is useless to fraudsters. They understand perfectly well how to find out the card number. But they usually try to trick the bank client into giving more information.
Please note: the plastic card must also have a 3-digit combination - this is the CVV code, which is necessary to confirm payments. Including on the Internet. It cannot be disclosed to strangers.
What is a card account number
This is a fundamentally different requisite. The money that is transferred changsha mobile number database to you by the card number is actually stored on the account linked to it. It can be used even if the "plastic" is frozen or reissued.
The card account is a 20-digit combination, which also contains encrypted important information about the bank and the holder of the payment instrument:
Client category – encrypted in numbers from 1 to 3. Individuals’ numbers start with “408”, private companies’ numbers start with “407”, metal account holders’ numbers start with “203”, and so on.
The purpose of the account or the type of activity of its holder - this information is indicated by the 4th and 5th digits. Thus, the combination "02" indicates that the bank client has the status of an individual entrepreneur.
Account currency – information is encrypted in numbers from 6 to 8. For example, “810” for the ruble or “978” for the euro.
Bank branch - indicated by numbers 10 through 13.
Account type – indicated by numbers 14 through 20.
As you may have noticed, one digit is missing – the ninth. It is a control digit and does not contain encrypted data. It is used to eliminate errors in money transfers – if a bank client makes a typo, it is unlikely that the money will end up in someone else’s account. Most likely, the transaction will simply be cancelled due to non-existent details.