MediaWiki:Checkuser-summary

This tool scans recent changes to retrieve the IPs used by a user, or the users/edits from an IP or IP range.
 * CIDR format IP ranges are supported for both IPv4 (/16 to /32) and IPv6 (/96 to /128).
 * Client IP information can be retrieved where available by appending the IP with "/xff".
 * No more than 5000 edits will be returned for performance reasons.

Use for good reason only, and in accordance with Wikimedia Foundation CheckUser policy.