This part of ISO/IEC 7812 specifies a numbering system for the identification of issuers of cards that require an issuer identification number (UN) to operate in international, interindustry and/or intra-industry interchange.
BS ISO/IEC 7812-1:2006 history
2017BS ISO/IEC 7812-1:2017 Identification cards. Identification of issuers. Numbering system
2015BS ISO/IEC 7812-1:2015 Identification cards. Identification of issuers. Numbering system
2006BS ISO/IEC 7812-1:2006 Identification cards - Identification of issuers - Numbering system