CheckUser was installed on 2013-2-5:
0:0:0:0:0:0:0:1 (block) (13:54, 5 February 2013 -- 15:20, 5 February 2013) [4] (~140 from all users) [RDNS · RBLs · Traceroute · Geolocate · Tor check · WHOIS] ::1 (block) (20:38, 13 July 2012 -- 13:12, 5 February 2013) [133] (~140 from all users) [RDNS · RBLs · Traceroute · Geolocate · Tor check · WHOIS] 127.0.0.1 (block) (22:49, 17 November 2012 -- 11:44, 10 December 2012) [35] (~46 from all users) [RDNS · RBLs · Traceroute · Geolocate · Tor check · WHOIS]
Version: unspecified
Severity: normal
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=54219