PIN block formatsEdit online All PIN block formats have a code assigned to them. ANSI X9.8This format is also named ISO format 0, VISA format 1, VISA format 4, and ECI format 1.ISO Format 1Example code for ISO Format 1.ISO Format 2Example code for ISO Format 2.ISO Format 3The formats of the intermediate PIN-block, the PAN block, and the ISO-3 PIN-block.ISO Format 4Example code for ISO Format 2.Visa Format 2Example code for Visa Format 2.Visa Format 3Example code for Visa Format 3.IBM 4700 Encrypting PINPAD FormatExample code for IBM® 4700 Encrypting PINPAD Format. This format uses the value X'F' as the delimiter for the PIN.IBM 3624 FormatThis format requires the program to specify the delimiter, X, for determining the PIN length. IBM 3621 FormatThis format requires the program to specify the delimiter, X, for determining the PIN length. ECI Format 2This format defines the PIN to be 4 digits. ECI Format 3Example code for ECI Format 3.Parent topic: PIN formats and algorithms