whoxy.com
WHOIS intelligence service for searching domain ownership, history, and registrar data.
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osint.sh
OSINT.sh tool for checking historical DNS records and domain infrastructure changes.
dnsdumpster.com
is a website that will help you discover hosts related to a specific domain.
whois.domaintools.com
Domain Tools is a web tool for finding, checking, or analyzing online information related to domains, networks, and digital services.
forwardemail.net
Open-source email forwarding and hosting for custom domains, with unlimited aliases, standards-based mail access, and encrypted-storage options.
mxtoolbox.com
Network diagnostic toolbox for DNS, MX, blacklist, SMTP, and domain health checks.
similarsites.com
Discovery tool for finding websites similar to a domain, brand, or online service.
simplelogin.io
Open-source email alias service for receiving and replying without exposing a personal address, with apps, extensions, custom domains, and self-hosting support.
siteslike.com
Website discovery tool for finding similar websites by category, topic, or domain.
osint.sh
OSINT.sh tool for discovering subdomains connected to a target domain.
cipher387.github.io
Cipher387's large OSINT tool collection covering social media, domains, people, maps, and more.
db.aa419.org
Database of fake and fraudulent websites used to research online scams, phishing pages, and suspicious domains.
abookofcreatures.com
ABookOfCreatures helps find books, reading material, archives, or public-domain educational texts.
activisthandbook.org
Activist Handbook helps find books, reading material, archives, or public-domain educational texts.
anatomyarchive.org
AnatomyArchive helps find books, reading material, archives, or public-domain educational texts.
apolloarchive.com
ApolloArchive helps find books, reading material, archives, or public-domain educational texts.
biodiversitylibrary.org
Biodiversity Heritage Library helps find books, reading material, archives, or public-domain educational texts.
search.cerast-intelligence.com
Searchable archive of exposed panels and misconfigurations found across domains by continuous internet-wide scanning; look up the exposure findings on
characterdesignreferences.com
Character Design References helps find books, reading material, archives, or public-domain educational texts.
chordbook.com
ChordBook helps find books, reading material, archives, or public-domain educational texts.
dedicatedornot.com
Dedicated or Not is a web tool for finding, checking, or analyzing online information related to domains, networks, and digital services.
completedns.com
DNS History is a web tool for finding, checking, or analyzing online information related to domains, networks, and digital services.
dnsai.com
Free DNS, WHOIS, DKIM discovery, SPF/DMARC analysis and blacklist checks with plain-English results, no signup.
dnslytics.com
DNS intelligence platform for researching domains, IPs, hosting, and related infrastructure.