DNS Lookup & Propagation Checker
Query A/AAAA/CNAME/MX/TXT/CAA records across Google, Cloudflare, Quad9, and OpenDNS to compare propagation and answer differences.
Built for propagation checks and DNS troubleshooting
Use it after nameserver changes or SPF, DMARC, and DKIM TXT updates to compare what public resolvers are returning.
Mail DNS Authentication Checker
Same resolver/hostname is throttled for a few seconds to avoid abuse.
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