Editing ISSN (section)

=== Register ===
The International Centre maintains a database of all ISSNs assigned worldwide, the ''ISDS Register'' (International Serials Data System), otherwise known as the ''ISSN Register''. {{As of|2016|12|31|alt=At the end of 2016,}} the ISSN Register contained records for 1,943,572 items.<ref>{{cite web |title=Total number of records in the ISSN Register |url=https://www.issn.org/wp-content/uploads/2017/02/Total-records-in-Register.pdf |publisher=ISSN International Centre |access-date=23 February 2017 |date=February 2017 |archive-date=24 February 2017 |archive-url=https://web.archive.org/web/20170224055145/http://www.issn.org/wp-content/uploads/2017/02/Total-records-in-Register.pdf |url-status=live }}</ref> The Register is not freely available for interrogation on the web, but is available by subscription.

* The print version of a serial typically will include the ISSN code as part of the publication information.
* Most serial websites contain ISSN code information.
* Derivative lists of publications will often contain ISSN codes; these can be found through on-line searches with the ISSN code itself or serial title.
*[[WorldCat]] permits searching its catalog by ISSN, by entering "issn:" before the code in the query field. One can also go directly to an ISSN's record by appending it to "{{code|https://www.worldcat.org/ISSN/}}", e.g. [https://www.worldcat.org/ISSN/1021-9749 n2:1021-9749 – Search Results]. This does not query the ISSN Register itself, but rather shows whether any WorldCat library holds an item with the given ISSN.
<!-- Though an [https://www.issn.org:8080/English/pub/faqs/issn/issnchecking ISSN checking facility] {{Dead link|date=July 2022}} is available, this is a tool for checking the validity of an ISSN number format, not for querying the ISSN Register to determine what serial the input number is associated with. -->