Tools

Look up all DNS records for any domain: A, AAAA, MX, TXT, NS, CNAME and SOA, live.

Fetch and inspect a live SSL/TLS certificate: issuer, validity, expiry countdown and SANs.

Look up a domain's WHOIS record: registrar, creation and expiry dates, name servers and status.

Find the PTR hostname(s) for a public IP address and forward-confirm them (FCrDNS).

Turn an IPv4 CIDR block into network, broadcast, mask, host range, and usable host count.

Paste DNS records and get each type explained in plain English with its security implications.

Break down an IPv4 address: class, scope, private/reserved status, decimal/hex/binary, and reverse-DNS pointer.