Enter a SEDOL and a correct ISIN will be calculated for you, if possible:
A SEDOL (Stock Exchange Daily Official List) is a 7-character alphanumeric code that serves as the National Securities Identifying Number for all securities issued in Ireland and the United Kingdom.
A SEDOL consists of two parts:
• A six-character alphanumeric code
• A single check digit.
For example: B03MLX2 (Royal Dutch Shell-A)