DNS tools
Seven focused DNS lookups — records, propagation across resolvers, DNSSEC, domain WHOIS/RDAP, email authentication, NS/glue consistency, and reverse-DNS delegation.
DNS record lookup
Look up A/AAAA/MX/TXT/NS/SOA/CNAME records for a domain.
Propagation checker
Compare a domain's records across multiple public resolvers side by side — see at a glance whether they've all converged.
DNSSEC validator
Check whether a domain's DNSSEC chain validates.
Domain WHOIS / RDAP
Registrar, creation/expiry dates, and nameservers for a domain.
SPF / DKIM / DMARC checker
Validate a domain's email-authentication records and surface any issues.
NS / glue consistency checker
Compare parent-reported NS records against the zone's own authoritative NS records.
Reverse-DNS delegation checker
Check whether a prefix's reverse zone is delegated, with a sample PTR spot-check.