Nombor Siri Piawai Antarabangsa: Perbezaan antara semakan

Untuk mengesahkan digit simak, kirakan jumlah kesemua lapan digit ISSN didarabkan oleh kedudukannya di nombor, mengira dari kanan (jika digit simak adalah X, kemudian tambahkan 10 ke jumlah). Modulus 11 pada jumlah seharusnya menjadi 0.

 

Kod ISSN dilantik oleh sebuah rangkaian ISSN National Centres, biasanya diletakkan di [[perpustakaan kebangsaan]] dan dikordinasikan oleh ISSN International Centre berasaskan di [[Paris]]. The International Centre is an [[International organization|intergovernmental organization]] created in 1974 through an agreement between [[UNESCO]] and the French government. The International Centre maintains a database of all ISSNs assigned worldwide, the ''ISDS Register (International Serials Data System)'' otherwise known as the ''ISSN Register''. The ISSN Register contains ISSN codes and descriptions for more than one million periodicals<ref>The one million milestone was reached in 2001 according to [http://www.issn.org/en/node/330 the ISSN statistics information page]. Retrieved [[2005]]-[[07-17]].</ref> with around 50,000 new records added yearly.