DNS

DNS Lookup

Query DNS records (A, AAAA, MX, TXT, NS, CNAME) for any domain.

DNS lookup runs on our server — uses system resolver.

How to use

  1. Enter a domain, URL, or value relevant to DNS Lookup.
  2. Run the check and review the output carefully.
  3. Apply recommended fixes, then run the check again to verify.

Common use cases

  • Pre-deployment validation for DNS Lookup.
  • Incident triage when security checks fail in production.
  • Periodic security review as part of technical SEO and hardening.

Example inputs

example.comgoogle.com

Common issues and fixes

No A/AAAA records

Domain has no IP mapping. Check DNS propagation or domain configuration.

DNS propagation

Changes can take 24–48 hours. Use TTL to estimate propagation time.

Recommended remediation

Add A/AAAA records in your DNS provider. For email, add MX and SPF TXT records.

FAQ

Is DNS Lookup free to use?

Yes. This tool is free and can be used without account registration.

Do you store submitted values?

Only the minimum processing needed for the check. For client-side tools, data stays in your browser.

How should I use these results?

Use the output as a diagnostic baseline, apply fixes in your stack, then re-run the check to confirm remediation.

Related security tools

SPF Record Checker

Fetch and parse SPF (Sender Policy Framework) records for a domain to validate email security.

WHOIS Lookup

Retrieve domain registration details including registrar, registrant, creation date, and expiry.

Port Checker

Check if TCP ports are open. Host + ports → connect test.

MX Record Lookup

Check mail server (MX) records. Priority order.