DNS Lookup

Look up DNS records — A, AAAA, MX, NS, SPF, DMARC, CAA. Check email authentication and nameservers.

All record typesSPF & DMARCEmail config~2 seconds
This tool analyzes the single URL you enter, not your entire website.
Analyzing...Running checks. This usually takes a few seconds.

What We Check

Every check comes with a pass/fail result and specific fix instructions.

Has A

A records point your domain to an IPv4 address. Required for your website to load.

Has Aaaa

AAAA records provide IPv6 connectivity. Increasingly important as IPv6 adoption grows.

Has Ns

Nameserver records delegate DNS resolution for your domain.

Ns Redundancy

At least 2 nameservers provide redundancy if one goes down.

Has Mx

MX records tell email servers where to deliver mail for your domain.

Has Spf

SPF records prevent email spoofing by specifying which servers can send email for your domain.

Has Dmarc

DMARC builds on SPF and DKIM to prevent email fraud and phishing.

Has Caa

CAA records restrict which Certificate Authorities can issue SSL certificates for your domain.

Why It Matters

Numbers that make a difference for your website.

8

Record Types

Complete DNS picture

Email

Auth

SPF + DMARC checks

IPv6

Ready

AAAA record detection

Security

CAA

Certificate restrictions

Frequently Asked Questions

Common questions about this tool and how to use the results.

Why check DNS records?
DNS misconfigurations can cause email delivery failures, security vulnerabilities, and website downtime. Regular checks prevent problems.
What is SPF and why do I need it?
SPF (Sender Policy Framework) tells email providers which servers can send email from your domain. Without it, spammers can forge emails from your address.
What is DMARC?
DMARC combines SPF and DKIM to give domain owners control over how email authentication failures are handled. It prevents phishing attacks using your domain.

Ready to audit your site?

Enter your URL above and get results in seconds. Completely free.

Start Audit
SSL CertificateSecurity HeadersHTTP HeadersTechnology Detector