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DNS & Domains tools

DNS lookup, ports, IP, WHOIS

Query DNS records (A, AAAA, MX, TXT, NS, CNAME) for any domain using public DNS API.

Check if TCP ports are open. Host + ports → connect test.

Quick one-off URL check. HTTP status + response time.

Validate IPv4/IPv6. Private, loopback. 100% client-side.

IPv4 subnet calculator. Network, broadcast, host range.

Retrieve domain registration details including registrar, registrant, creation date, and expiry.

Discover subdomains via Certificate Transparency logs. Passive enumeration — no brute force.

Check when a domain was registered. Domain age, creation date, expiry, registrar — from WHOIS.

Look up PTR hostname for an IP. Reverse DNS for IPv4/IPv6. Like HackerTarget.

IP to location, ISP, ASN. Country, city, timezone. Free geolocation.

Check Certificate Authority Authorization. Restrict which CAs can issue SSL certs.

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