DNS Checker

Look up and diagnose every DNS record of any domain in seconds.

How it works

Enter a domain to get its A, AAAA, CNAME, MX, NS, TXT, SOA records with TTL values. Instantly see if SPF, DKIM and DMARC records are configured for email deliverability.

Worked example

Emails are landing in spam. The checker reveals a missing SPF record and an incorrect MX entry, letting you fix email authentication before your sender reputation drops.

Recommendations

Verify DNS after every domain or hosting change to catch propagation errors
Check SPF, DKIM and DMARC records before sending high-volume email
Keep TTL values low during migrations to speed up propagation

Tips & advice

Use the checker when customers report site or email outages
Confirm MX records match your email provider's required values
Validate CNAME records when setting up subdomains or CDNs

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DNS Checker

Look up and diagnose every DNS record of any domain in seconds.

Check my site — Free

100% Free No signup Private & secure

Step by Step

DNS Checker — step by step

Type a domain like example.com. The tool queries the current DNS infrastructure.

Select the record types to inspect: A, AAAA, CNAME, MX, NS, TXT, SOA.

Read each record with its value and TTL, plus email authentication status.

Fix missing or incorrect records at your DNS provider and re-check after propagation.

Help Center

SEO Tools FAQs

DNS records map a domain to its services: A/AAAA to IP addresses, MX to mail servers, CNAME to aliases, NS to nameservers, TXT to verification and auth data.

DNS changes take time to propagate because of TTL (time-to-live) values. Lowering TTL before a change speeds up propagation.

They are TXT-based email authentication records that prove your emails are legitimate and improve deliverability.

This is usually DNS propagation lag — different locations update at different times, so some visitors still use old records.

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