Free DNS Lookup (A, AAAA, MX, TXT, NS, CNAME)
Query any domain's DNS records live · A, AAAA, CNAME, MX, TXT, NS, and CAA · resolved over encrypted DNS-over-HTTPS.
Frequently asked
How does this run without a server?
Queries go directly from your browser to a public DNS-over-HTTPS resolver (dns.google) over HTTPS · the modern, encrypted way to resolve DNS. SimplyScan never sees what you look up.
Which records matter for security?
TXT holds your SPF and DMARC email policies, CAA restricts which authorities may issue TLS certificates for the domain, and unexpected NS or CNAME records are how subdomain takeovers hide. Our DNS Security checker grades DNSSEC and CAA specifically.
Related tools
- security.txt Validator · Check whether a site publishes a valid security.txt · the RFC 9116 file that tells researchers how to responsibly report vulnerabilities.
- CORS Tester · Test any URL for dangerous CORS misconfigurations · origin reflection, wildcard-with-credentials, and null-origin acceptance that can leak authenticated data.
- Exposed Files Scanner · Check whether your site accidentally exposes .env, .git/config, backup archives, or other high-risk files.