Wikipedia:Administrators' guide/Blocking/Tools: Difference between revisions

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===WHOIS===
* [http://whois.domaintools.com Domaintools] – Probably the most comprehensive of the WHOIS tools, however requires you enter a CAPTCHA and has a limit of about 50 lookups a day. Be sure to check not just the ASN but the network name, etc, when attempting to determine if an IP belongs to a school or is otherwise shared.
* [[toollabs:whois/gateway.py|Whois Gateway]] on labs – free, CAPTCHA-less and limitless WHOIS lookups for IPs. May not show the network name in some situations.
* [[toollabs:betacommand-dev/cgi-bin/SIL|Betacommand's WHOIS tool]] – returns the ASN and CIDR range for an IP, checks for global blocks and returns the block log. To use, append the IP to the URL like {{<code|><nowiki>?ip=1.2.3.4}}</nowiki></code>
* For an up-to-date list of the most commons tools used when checking IPs, refer to {{tl|anontools}}, passing it an IPv6 address if needed.