The International Securities Identification Number or ISIN Code is a unique code
that is used to identify specific securities. The National Numbering Agency (NNA)
– which is separate for each country – allocates ISINs for the securities issued
in the country.
All ISIN codes have 12 characters, and this code is made up of both letters and
numbers. This is how the numbering code is broken down:
- First two digits refer to the country in which the issuing company is headquartered
- The middle nine digits link back to the specific security and act as a unique identifier
- The final character called the ‘check digit’ acts as a check and prevents forgery
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