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DNS & domain
Reverse DNS
Reverse DNS
IP (v4 or v6) → PTR hostname(s).
IP address
Resolve
Copy share link
The link encodes your inputs in the URL fragment. Nothing is uploaded.
DNS & domain
All tools
DNS lookup
A, AAAA, MX, TXT, NS, SOA, SRV in one shot, against Cloudflare resolvers.
DNS propagation
Query a domain across 10 public resolvers (Cloudflare, Google, Quad9, OpenDNS, AdGuard, Verisign, Yandex, Level3, CleanBrowsing, ControlD) in parallel and see whether a zone change has landed everywhere.
CT log search
Search Certificate Transparency logs (crt.sh) for every cert issued for a domain: find forgotten subdomains.