Generate valid ISIN codes about datahelix HOT 3 CLOSED

STRUCTURE

Taken from https://www.isin.org/isin/
There are three parts to an ISIN as exemplified by US-049580485-1 (the dashes don't count, they are there to add clarity). The code can be broken down as follows:

• A two-letter country code, drawn from a list (ISO 6166) prepared by the International Organization for Standardization (ISO). This code is assigned according to the location of a company's head office. A special code, 'XS'�. is used for international securities cleared through pan-European clearing systems like Euroclear and CEDEL. Depository receipt ISIN usage is unique in that the country code for the security is that of the receipt issuer, not that of the underlying security.

• A nine-digit numeric identifier, called the National Securities Identifying Number (NSIN), and assigned by each country's or region's . If a national number is composed of less than nine digits, it is padded with leading zeros to become a NSIN. The numeric identifier has no intrinsic meaning it is essentially a serial number.

• A single check-digit. The digit is calculated based upon the preceding 11 characters/digits and uses a sum modulo 10 algorithm and helps ensure against counterfeit numbers.

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