CheckUser is an extension for the MediaWiki wiki software.
User interface; the default first page that you get after choosing Special:CheckUser
The results page that you get after checking a specific IP (or IP range).
The results page that you get after checking a specific registered account with the "get IPs" option.
User interface in German
Log example (German)
See mw:User:Voice of All/CheckUser2.0
The Checkuser logfile, who's been checking who?
Checkuser whois information, after you check an IP or range.
Various checkuser options.
Standard permissions: Administrator • Bureaucrat • CheckuserImport • Oversight • DevelopersExtensions: Boardvote extension • PovWatch extension