Subdomain Checker

Find public subdomains from certificate logs and DNS, and see which are live.

Ready

Subdomains found

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CT logs —

HackerTarget —

Live

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CNAME

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Dangling

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Subdomain report

Enter a domain above to see its publicly known subdomains, where each was found, and whether it is live, a CNAME alias or gone today.

Fair-use limit: 10 new lookups per hour and 30 per day for each visitor IP address. Results are cached for 12 hours.