
SecurityTrails
DomainTools
WhoisXML API
DomainOps
IP Ninja
SentryScore
openSquat
UptimeRobot
DomScan
DomainTools
WhoisXML API
dofo.com
Domsignal
Observe Domains
Whoisology
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Based on our record, SecurityTrails seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I'm having the same issue. https://securitytrails.com/ also had my "secret" staging subdomain. I made a catch-all certificate, so the subdomain didn't show up in CT logs. It's still a secret to me how my subdomain ended up in their database. - Source: Hacker News / over 1 year ago
DomainTools - Domain name research, including comprehensive Whois Lookup, Reverse Whois Lookup and Whois History.
WhoisXML API - Domain, IP, and DNS data provider
DomainOps - Monitor your domains, SSL certificates, and endpoints. Detect subdomain takeovers, CVEs, and security misconfigurations before attackers do.
dofo.com - Domain search platform Dofo.com gathers all registered (350 million) domains of the world in a single place. Dofo also brings together all the domain names that are on sale, provides useful features, all completely free.
IP Ninja - Advanced Network Intelligence API featuring enriched Reverse IP lookups, historical hostname mapping, and fully parsed WHOIS data for IPs and domains. Built for security researchers and developers seeking structured, actionable network insights.
Domsignal - Set of FREE tools to test your site for DNS, Security, and more.