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About Anna


Welcome to the Association of National Numbering Agencies.

If you have invested in stocks, bonds or investment funds, you are already familiar with our work. We are the numbering agencies around the world that assign a unique identification code to each new security as it is issued.

Our proudest achievement is the global adoption of a common standard for identifying securities, the ISIN (International Securities Identification Number) according to ISO Standard 6166. Securities from more than 120 nations are identified by ISINs. No matter where a security was first issued, its ISIN enables it to be recognized and traded between buyers and sellers virtually anywhere in the world.

ANNA is committed to the use of standard identifiers to make the financial world a more efficient, safer and more stable environment for investors and the financial institutions that serve them.

Free ISIN lookup service. NEW! 


In an increasingly regulated financial world, identifiers are more important than ever.

June 15, 2022

Confirmed at ANNA’s General Meeting, Brussels, June 2 & 3, 2022 London, 15th June 2022 – The Association of National … read more

March 23, 2022

ANNA and GLEIF win ‘Most Innovative Data Standards Initiative’ at the A-Team Innovation Awards 2022 Second win in a row … read more

February 24, 2022

ANNA Community Newsletter Keep up to date on the latest ANNA activities in this edition which celebrates 30 years of … read more

Who is anna?

ANNA “numbers the world” by assigning unique codes that identify securities in 120+ nations.

ANNA’s members are agencies that are part of financial banks, exchanges, depositories and regulatory agencies. But its people are senior experts from the national numbering agencies who contribute their time and expertise to help new numbering agencies and to keep the ISIN at the cutting edge of financial industry evolution. Read more.

Who is ANNA?

The ISIN – a global standard

Where is the ISIN?

The ISIN is a true global success story. More than 120 countries are assigning ISINs now, either through their own numbering agencies or with the assistance of experienced ANNA members.

Originally envisioned as special-purpose identifier for cross-boarder trading, the ISIN was initially issued in tandem with the local securities identifier. Today, in most major markets, the logical efficiency of a single global standard has been recognized and the ISIN is the only instrument identifier issued by the numbering agencies.


Countries Issuing ISINs

The World of Identifiers

ISO standards for financial information create
a common language of machines-readable codes that support accuracy, efficiency and mutual trust among global markets.

Though the ISIN was the first standard global identifier and continues to be central to all capital markets operations, the family has grown as needs were identified. Today, the group of ISO-standard identifiers are a “common language” understood all over the world, embedded into processes and software, and required in regulatory reporting.

Click here to learn how these standards are developed and how they work together.


ISIN (ISO 6166)
International Securities Identification Number

The ISIN is the core identifier of securities transactions and settlement. Read more.

CFI (ISO 10962)
Classification of Financial Instruments

For each ISIN, the CFI is a detailed description of the type of instrument. Read more.

MIC (ISO 10383)
Market Identification Code

For each ISIN, associated MICs show where the instrument is traded. Read more.