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The Wertpapierkennnummer, (WKN, WPKN, WPK or simply Wert), is a German securities identification code. Six digits or capital letters (excluding I and O), no check digit. == Changes in format == There have been several changes in the WKN definition: * WKN were switched from numeric to alphanumeric on 21 July 2003〔http://www.wmdaten.de/pdf_kundeninfo/KI2003-21.pdf (in German language)〕 * The first 2–4 Letters may show the issuer of the Instrument〔http://www.wmdaten.de/pdf_kundeninfo/KI2004-04.pdf (in German language)〕 * Many years ago, the WKNs were divided into different number ranges that represented different types of securities (e.g., stocks, warrants, funds, etc.). However, this number range system representing different classes of securities has been abandoned long ago. The WKNs and DE-ISINs are provided by (WM-Datenservice ). WKNs may be obsolete in future, since they may be replaced by International Securities Identification Numbers (ISINs). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Wertpapierkennnummer」の詳細全文を読む スポンサード リンク
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