LookDNS is analyzing...
DNS records are being checked in real time.
Validating domain
Checking NS / SOA records
Testing mail records
Checking DNSSEC & security
Comparing public resolvers
Professional DNS & Mail Diagnostic Platform

Analyze DNS health with clear, actionable results.

Check DNS records, delegation, propagation, mail configuration, reverse DNS, DNSSEC, CAA, AXFR and open resolver status from one clean interface.

Try: google.com cloudflare.com alastyr.com github.com
DNS NS, SOA, A, AAAA, MX, TXT and CAA checks
Mail SPF, DMARC and MX server resolution checks
Security DNSSEC, AXFR and open resolver diagnostics
Propagation Google, Cloudflare, Quad9 and OpenDNS results

Quick Tools

Use focused tools for common DNS and network checks.

DNS Check

Full DNS health and score analysis.

Reverse DNS

Check PTR records for IP addresses.

Mail Check

Analyze SPF, MX and DMARC health.

Whois

Lookup registrar and ownership data.

My IP

View your public IP information.

What LookDNS checks

Parent NS and authoritative NS comparison
Glue records and nameserver response
A, AAAA, MX, TXT, SOA, CAA and DMARC records
Public resolver propagation consistency
Zone transfer and open resolver security checks

Built for clear troubleshooting

Score-based DNS health summary
Warning and error focused issue list
Practical fix suggestions for each problem
Clean interface for support teams and customers
SEO-friendly domain result URLs