Fix ISIN | Calculate ISIN Check Digit

An ISIN is a 12-character code that identifies a financial security.

An ISIN consists of three parts:
• A two-letter country code
• A nine-character alphanumeric national security identifier
• A single check digit.

For example: US9311421039 (Walmart)

On this page, you can either:
• enter an ISIN without the check digit, or:
• enter a full ISIN you would like to fix (i.e. with an incorrect check digit)

In both cases, a correct ISIN will be calculated for you, if possible.

Enter ISIN