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Also, similar to the Master Card/Diners agreement, China Union Pay cards are now treated as Discover cards and accepted on the Discover network.While the vast majority of Visa's account ranges describe 16 digit card numbers there are still a few account ranges (forty as of 11 December 2013) dedicated to 13 digit PANs and several (439 as of 11 Dec.A payment card number, primary account number (PAN), or simply a card number, is the card identifier found on payment cards, such as credit cards and debit cards, as well as stored-value cards, gift cards and other similar cards.In some situations the card number is referred to as a bank card number.The card number is primarily a card identifier and does not directly identify the bank account number/s to which the card is/are linked by the issuing entity.The card number prefix identifies the issuer of the card, and the digits that follow are used by the issuing entity to identify the cardholder as a customer and which is then associated by the issuing entity with the customer's designated bank accounts.It also differs from Universal Payment Identification Code, another identifier for a bank account in the United States.
For example, if a card's IIN indicates a bank in one country, while the customer's billing address is in another, the transaction may call for extra scrutiny.
2013) account ranges where the issuer can mix 13 and 16 digit card numbers.
Visa's VPay brand can specify PAN lengths from 13 to 19 digits and so card numbers of more than 16 digits are now being seen. In 2011, UK domestic Maestro (formerly Switch) was aligned with the standard international Maestro proposition with the retention of a few residual country specific rules.
The remaining numbers on the card, except the last digit, are the individual account identification number. IINs and PANs have a certain level of internal structure and share a common numbering scheme set by ISO/IEC 7812.
Payment card numbers are composed of 8 to 19 digits, The first eight digits of a card number (including the initial MII digit) are known as the issuer identification number (IIN).