Fix ISIN | Calculate ISIN Check Digit

An ISIN is a 12-character code that identifies a financial security. If you would like to apply for a ISIN code and need assistance with creating or generating and obtaining a ISIN number please reach out to us for application needs by email: isin@isin.org

An ISIN consists of three parts:

• A two-letter country code
• A nine-character alphanumeric national security identifier
• A single check digit.

For example: US38259P5089 (Alphabet - Google)

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.

Disclaimers:

• Note that the result can be a non-existing number. Since it is being calculated by an algorithm, even if a number like an ISIN shows up it may not exist – it’s just the algorithm showing what could exists.
• This tool is an algorithm. Just because you enter a code does not mean it is an active number or a created number. Even if a code is generated it does not indicate that the code is active or was created.
• This tool is provided for educational purposes only.  ISIN.org provides no guarantee or warranty that the data is current or accurate, and thus any use of the data or information obtained from our system should be independently verified or used at your own risk.