De National Securities Identifying Number (NSIN) is a neinstejiga alphanumerischa Code, dea a eihdeitige Identifikazion fia a Weatpapia innahoib vo on bstimmdn Land doastejd. Se is elementara Bstondtei vo da Internationaln Weatpapiakennnumma (ISIN), de a Weatpapia international eihdeitig kennzoachnd.