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Subdomain Discovery

🟢 Live dataUnlimited

Find every subdomain of any domain via public certificate transparency logs (crt.sh). 100% live, no API key. Reveals what attackers can already see — sales, staging, internal admin panels, forgotten infrastructure.

What it does

Fetched in real time from an authoritative API (Google, DataForSEO, etc.). Numbers are real.

What you need to provide

Root domainrequired
Example: example.com

Free tier limits

Unlimited. This tool runs on free APIs (Google / open data) — unlimited usage on every plan.

Try it

Open Subdomain Discovery →