NetSight beta

DNS Lookup

Resolve DNS records for any hostname. Inspect A, AAAA, MX, TXT, NS, SOA, CNAME, CAA, SRV in one view. Compare answers across resolvers for propagation checks.

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, CAA and SRV together so you see the full picture in one view instead of running multiple dig commands.

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.
IP Lookup
Instant geolocation, ISP, ASN, abuse history and reputation for any IPv4 or IPv6 address.
WHOIS Lookup
Domain ownership, registrar, nameservers and key dates.
Subdomain Finder
Enumerate subdomains via Certificate Transparency and OTX.