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DNS Lookup

Resolve DNS records for any hostname: A, AAAA, MX, TXT, NS, SOA, CNAME and CAA in one view, with DNSSEC status. Enter an IP address for its reverse PTR name.

About DNS lookup

Resolve any hostname from an authoritative DNS over HTTPS resolver. NetSight queries records in parallel and shows A, AAAA, CNAME, MX, TXT, NS, SOA and CAA together with the DNSSEC status, so you see the full picture in one view instead of running multiple dig commands. Enter an IP address instead of a name to get its reverse PTR record.

Record types

  • A / AAAA: the IPv4 and IPv6 addresses the name resolves to.
  • CNAME: a canonical-name redirect: this name is an alias for another.
  • MX: mail exchangers, ordered by preference.
  • TXT: free-form records often used for SPF, DKIM, DMARC, domain-verification tokens.
  • NS / SOA: the authoritative nameservers and the zone start-of-authority record.
  • CAA: Certificate Authority Authorization: which CAs are allowed to issue certificates for the domain.
  • SRV: service records used by XMPP, SIP, Minecraft and others.

When it's useful

  • Confirming a DNS change has propagated to public resolvers.
  • Auditing SPF, DKIM and DMARC records before debugging email bounces.
  • Finding which CAs are authorized to issue certificates for a domain.
  • Getting the MX fallback order when mail delivery is flapping.

Questions

Which DNS resolver does NetSight use?
Public DNS over HTTPS resolvers (Cloudflare 1.1.1.1 and Google 8.8.8.8) are queried at the edge. Answers are cached per TTL so repeated lookups are instant.
Does this check propagation across regions?
For a cross-region propagation view see the dedicated DNS propagation tool. This lookup goes to a single authoritative resolver per request.
Why is TXT truncated?
Large TXT records (>255 bytes) are returned as concatenated segments: we join them together for readability.
Mail Check
Domain mail posture: MX, SPF, DKIM selector probe, DMARC.
DKIM Check
Find a domain's DKIM selectors automatically, or check one you already know.
DNS Propagation
Query a record from probes in several countries at once and see whether they agree.
Email Header Analyzer
Paste raw headers: route with delays, SPF, DKIM, DMARC, likely origin and a plain verdict.