|It has been suggested that this article be merged into International Securities Identification Number. (Discuss) Proposed since June 2013.|
|This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations. (April 2015)|
ISO 6166 defines the structure of an International Securities Identifying Number (ISIN). An ISIN uniquely identifies a fungible security. Securities with which ISINs can be used are equities, debts, ETFs, options, derivatives, and futures.
ISINs consist of two alphabetic characters, which are the ISO 3166-1 alpha-2 code for the issuing country, nine alpha-numeric digits (the National Securities Identifying Number, or NSIN, which identifies the security), and one numeric check digit. The NSIN is issued by a national numbering agency (NNA) for that country. Regional substitute NNAs have been allocated the task of functioning as NNAs in those countries where NNAs have not yet been established.
- Association of National Numbering Agencies – has more information on ISO 6166 and provides contact details to National Numbering Agencies being responsible for ISIN allocation
- Prüfziffernberechnung in der Praxis – site in German; describes in detail how to construct the ISIN from the NSIN