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.