WikiScanner (also known as Wikipedia Scanner) is a tool created by Virgil Griffith and released on August 14, 2007, which consists of a publicly searchable database that links millions of anonymous Wikipedia edits to the organizations where those edits apparently originated, by cross-referencing the edits with data on the owners of the associated block of IP addresses.

WikiScanner does not work on edits made under a username. The Associated Press reported that Griffith wanted "to create minor public relations disasters for companies and organizations [he] dislike[s]."

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