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ISIN (ISO 6166)


International Securities Identification Number

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The International Securities Identification Number (ISO 6166) is the recognized global standard for unique identification of financial instruments. ISINs are used to identify most types of financial instruments, include equity, debt and derivatives.

The ISIN code consists of a total of 12 characters as follows:

The first two characters are taken up by the alpha-2 country code as issued in accordance with the international standard ISO 3166 of the country where the issuer of securities, other than debt securities, is legally registered or in which it has legal domicile. For debt securities, the relevant country is the one of the ISIN-allocating National Numbering Agency. In the case of depository receipts, such as ADRs, the country code is that of the organization that issued the receipt, rather than instead of the one that issued the underlying security.

The next nine characters are taken up by the local numbering code of the security concerned. Where the national number consists of fewer than nine characters, zeros are inserted in front of the number so that the full nine spaces are used.

The final character is a check digit computed according to the modulus 10 “Double-Add-Double” formula.

For ISINs of OTC derivatives, which will be allocated by a single global numbering agency, the initial two digits will use a custom “EZ” code. The ISIN will be generated on a de novo basis, with no reference to previous or other codes.

Who issues the ISIN

In the case of securities, other than debt securities, in locales where a NNA recognised by ANNA operates, this organization issues the ISIN for securities if the issuer is registered or domiciled in the country where the NNA operates. For debt securities the NNA that issues the ISIN is either one of the international securities clearing organizations or the responsible NNA in accordance with ISO 6166.

In the case of those countries where no NNA exists, a substitute agency allocates the number.

ANNA ISIN Lookup Service

Welcome to the ANNA ISIN Lookup Service, a free utility that enable users to search for ISINs by filling out a simple form.

This service searches the global ISIN archive which is comprised of the ISINs issued by national numbering agencies and maintained by the ANNA Service Bureau. To find “EZ” ISINs created through the Derivatives Service Bureau, please email tech.support@anna-dsb.com to register for the free DSB lookup service.

The lookup form requests data that would be associated with the ISIN, such as issuing country, currency type, instrument type and other details. Usually it is not necessary to fill out every data point associated with the ISIN. However, in some cases, having only partial information will result in a response of multiple ISINs, and more detail will be required to narrow that down to a single ISIN.

Ordinarily, ISIN search results will include the CFI (Classification of Financial Instruments – ISO 10962) and FISN (Financial Instrument Short Name – ISO 18774) with the ISIN. These codes are important reporting elements for several regulations such as MiFID II/MiFIR, MAR, EMIR, etc. If results do not include these additional codes, please contact your local numbering agency or ANNA to obtain them.

Multiple search results can be consolidated into a downloadable file. For more information, please register or login below.