National Securities Identifying Number
A National Securities Identifying Number, or NSIN, is a generic nine-digit alphanumeric code which identifies a fungible security. The NSIN is issued by a national numbering agency (NNA) designated for that country. Regional substitute NNAs have been allocated the task of functioning as NNAs in those countries where NNAs have not yet been established. NSINs are used as part of the makeup of a product's ISIN. Sample NNA and NSIN designations
 In the United States and Canada the NNA is the CUSIP Services Bureau and the NSIN is the CUSIP. In the United Kingdom, the NNA is the London Stock Exchange and the NSIN is the SEDOL. In France, the NNA is Euroclear France and the NSIN used to be the Sicovam. As of July 1, 2003 SICOVAMs are no longer issued, ISINs being used instead. In Germany, the NNA is Wertpapier-Mitteilungen and the NSIN is the WKN. In Italy, the NNA is the Bank of Italy after the incorporation of the Ufficio Italiano Cambi (Italian Exchange Bureau). In Switzerland, the NNA is SIX Financial Information and the NSIN is the Valor Number

See also 
 CUSIP
 ISO 6166
 ISO 10383
 ISO 10962
 International Securities Identifying Number
 National numbering agency

External links
ANNA Directory: Numbering Agencies for all participating countries

Financial regulation
Security identifier types
Financial metadata