crackstation.net
Hash lookup service for checking password hashes against large precomputed cracking databases.
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hashes.org
Hash search database for looking up password hashes and contributed recovery results.
informnapalm.org
Research database covering Russian aggression, military activity, and related open-source evidence.
ip2location.com
A comprehensive IP intelligence database and API for accurate geolocation, ASN mapping, and VPN/Tor/Proxy detection.
toolbar.netcraft.com
is an online database that will provide you a report with detail information about a particular website and the history associated with it.
whois.arin.net
is a web service for Whois data contained within ARIN's registration database