International Securities Identification Number

The International Securities Identification Number (ISIN) is a twelve-digit letter-number combination and provides an identification for a security is traded on the exchange. The structure of the ISIN is described in ISO 6166.


In the context of international harmonization of financial markets has made ​​the decision in January 2000 to introduce binding the ISIN standard in Germany.

Traded securities, which are provided with an ISIN, stocks, funds, bonds (or bonds), options or futures can be. Only fungible securities get an ISIN. Not all publicly traded products get a ISIN, eg other product identifications are used for commodity futures.

The ISIN identifies a security, clearly, but not to trade in a security. For example, Bayer AG shares (ISIN DE000BAY0017 ) to fifteen different stock exchanges (electronic trading and floor trading) in four different currencies are traded. By combining Market Identifier Code (MIC ) according to ISO 10383 and ISIN this trade but uniqueness is achieved.

The ISINs be gradually introduced worldwide. Currently, they have introduced many states as another way for the identification of securities. Few of these states have been declared a priority identification. In Germany, the publisher community Securities releases, Keppler, Lehmann GmbH & Co. KG officially responsible for the allocation of ISINs.

The audit of the ISO 6166 standards is carried out by the Association of National Numbering Agencies ( ANNA ). It is an association of all national authorities for the allocation of securities identification numbers.

All securities issued in the U.S. and Canada, the CSB assigns an ISIN. The CSB is headed by the rating agency Standard & Poor's and demanded royalties from anyone who used such an ISIN, because they have copyright on a part of ISINs. Typically this is a fee of $ 10,000 per year for the use 500-2500 ISINs.


The structure of the ISIN is determined according to ISO 6166: two-letter country code, the nine-digit alphanumeric NSIN ( National Securities Identifying Number) and a check digit. The country code is the ALPHA - 2 code ISO 3166-1 of the country which has issued the ISIN for a security. This can be quite different from the home country of the issuer of securities ( Example: A German company is going in the United States a bond. ) Is an exception to the country- independent abbreviation " XS " that which is used for international securities that will be deposited with Clearstream or Euro Clear. Meanwhile, there are also " EU " ISIN codes to index securities (eg EU0009658145 for the Euro Stoxx 50 Price Index ), ( eg EU0009652627 for EUR / JPY ), or for bonds of the EU ( for currencies, for example: EU000A0T74M4 ).

The ISIN is published by the respective national organization ( National numbering agency, NNA). In the German stock market trading securities have been classified on a six-digit WKN ( security identification number). This was replaced on 22 April 2003 by the ISIN, which does not mean that the WKN was thus abolished. The WKN is parallel to the ISIN still used by many systems for the identification of the radiation emitted in Germany securities.

  • German ISINs start with the country code DE. The following NSIN consists of nine numbers or numbers. This one ISIN with three zeros followed by the previous WKN were automatically generated with the introduction of ISIN codes from all (until then only numerically existing ) WKNs. With the final check digit results eg for the Bayer AG ( WKN: BAY001 ) the ISIN DE000BAY0017. Also the since 2003 existing in alphanumeric form WKNs are derivable from today ISIN codes.
  • In Austria ISINs start with the country code AT, followed by the base number and check digit. The base number is 9 digits. These can contain both letters and numbers. Should the base number to report less than nine digits, a corresponding number is preceded by zeros.
  • Swiss ISINs start with CH followed by a security number and finally the check digit.
  • ISIN codes to U.S. and Canadian stocks (that is U.S. and CA, as well as for the countries with the ISO 3166 Code PA / AN / BM / KY / VG / AG / PR / PH / MH / BS / FC / AR / AI / BB) start with the country code (eg U.S. ), followed by the 9- digit CUSIP and finally the check digit.
  • French ISIN included after the country code FR, the SICOVAM number and finally the ISIN check digit.
  • Danish ISIN included after the code DK two zeros, then the 7-digit Danish Fondskode and finally the ISIN check digit. The last digit of Fondskode (ie the penultimate point of ISIN ) is also a check digit, which is formed such that when multiplied by the individual offices of the Fondskode from right to left with 1, 2, 3, 4, 5, 6, 7 sum of the products by eleven is evenly divisible, ie sum MOD 11 gives a value of zero.
  • The ISIN for an English or Irish securities consists of the land (ISIN starts with GB or IE, as well as the ISO 3166 codes JE / GG / IM), followed by the SEDOL number (which contains its own check digit on the left side padded with zeros ) and the ISIN checksum.
  • Japanese ISINs consist of the country code JP, followed by an attribute code (one digit, eg 3 = societies, such as company ), a five-digit name code, a three digit Securities Type Code (eg 000 = common stock = common shares ) and the final check digit.
  • A Belgian NSIN is correct when first seven points ( = the first seven digits of the ISIN for " BE" ) through 97 are smooth minus the points 8 and 9 divisible. Example: The ISIN BE0003796134 part of the shares of Dexia. The NSIN is correct because (0003796 - 13) MOD 97 = zero results. The rearmost point of the ISIN (here " 4") is, as always, the separate ISIN check digit itself
  • ISIN, starting with the code " XS ", usually refers to bonds, which are held by Clearstream or Euro Clear. Behind the XS code follows the nine-digit common code and then the check digit of the ISIN. The same applies for Luxembourg ISIN, starting with LU (especially funds). The common code also contains a check digit, which is formed by multiplying the first eight digits from left to right in sequence with 3, 2, 7, 6, 5, 4, 3, 2 and the products are then added together. The check digit ( ninth digit of the common code) is obtained as minus 11 Penalty rest of the sum ( ie 11 - ( sum mod 11) ). If the result is 10, the check digit is zero. This algorithm applies to the vast majority of common codes, namely for those that do not begin with "000" ( ie not for XS000 ... or LU000 ... and in this case, the ninth digit of the common code does not contain a check digit).

German ISIN are not the only ones in which the German WKN is included. This is contrary to all ISIN to that of the German World Cup (securities releases, see above) will be awarded. In ISIN that begin with the following country code ( ISO 3166 ), the German WKN and then finds himself in a rule according to the three zeros of the check digit ISIN: DE/GI/SA/EU/PG/LR/AE/KZ/RU/XF/XC/CN/QA/NA/UA/MK/BH/OM/NP/CI/NG/IQ/BT/KG/SO/UZ/TM/FO/TZ/SD/SY/SS/MR/TG.

The check digit is calculated using the so-called double - add- double method ( Luhn algorithm ), where all the letters are replaced by numbers: For the position of the letter is increased by nine in the alphabet, such as A = 10, B = 11, ..., Z = 35


Bayer AG: ISIN WKN DE000BAY0017 BAY001

Treasury Corporation of Victoria, 5 3 /4%, from 2005 to 2016: ISIN AU0000XVGZA3

Internal and other ISINs

Interim, however official ISIN codes start with XA, XB, XC and XD and come from " spare publishers " (these are XC = Wertpapiermitteilungen, XA = CUSIP / Standard & Poor's, XD = SIX Telekurs and XB = EUR Euroclear France ). Such ISIN will be awarded, for example, foreign securities and instruments, if no competent national publisher is missing or this has not issued ISIN.

For papers that are not publicly traded, banks can define internal ISINs for purposes of illustration in their IT systems. These begin with the pseudo - country code " XF " and not in the interbank transport (incl. Clearer, exchanges, etc. ) are used. The associated SIN begins with a zero, so that follow after the ISIN ticker symbol " XF " four zeros. Since they are only used internally, they are not unique, ie, different banks may have the same XF ISIN use for different securities. For example, the ISIN was awarded XF0000C14922 for repair claims on Contitech shares until July 2012.

Since June 30, 2003 awards € Euroclear France interim dummy ISIN according to ISO 6170, starting with " QS".

In Switzerland ISIN codes are for securities, but do not have a regular ISIN Security number, assigned, starting with QT. Next comes the Swiss security number and then the ISIN check digit.

Deleted WKN, ISIN who have not yet obtained an ISIN with the prefix " QW ".