Domain Toolkit

WHOIS / RDAP Lookup Registrar, creation and expiry dates, nameservers and DNSSEC via RDAP with WHOIS fallback. Email Security SPF, DMARC and DKIM analysis. Counts SPF DNS lookups against the 10-lookup RFC limit. DNS Propagation Checker See which global resolvers have picked up your DNS changes. DNS Zone Recovery Reconstruct a zone file from live DNS records, ready to import. Zone Transfer Test Test whether nameservers allow AXFR requests from unauthenticated clients. security.txt Checker Validate security.txt for required fields, expiry and RFC 9116 compliance. Security Header Checker Scan HTTP security headers: CSP, HSTS, X-Frame-Options and more. Post-Quantum TLS Check Test support for ML-KEM post-quantum hybrid key exchange and ECH. SSL Certificate Checker Check certificate expiry date, days remaining, issuer, covered names and TLS version.