First digit is always a letter, which represents the country of issue. First six digits represent the issuer, next two represent the security, and the final digit is the check digit. Final digit is a check digit, computed on a multiplicative system. Stands for Committee on Uniform Securities Identification Procedures. The first six digits identify the issuer.
First digit is always a number.
To Buy International Securities Identification Number. This is a twelve digit code developed by the International Standards Organization that represents a security. The first two letters always represent the country code, and the ISO standards are used. Leading spaces are padded with 0. Used on the Reuters Terminal to pull up a particular security.