Tools

DNS Checker

Check DNS propagation for A, AAAA, CNAME, MX, TXT, NS, and SOA records across multiple public resolvers.

DNS Checker

Check DNS propagation for A, AAAA, CNAME, MX, TXT, NS, and SOA records across multiple public resolvers.

Advanced settings

What this DNS Checker validates

This DNS Checker compares propagation of a domain record across multiple public resolvers, so you can verify whether DNS changes are consistently visible worldwide. It helps diagnose SEO-impacting DNS issues such as stale A/AAAA records after migrations, mismatched CNAME targets, delayed MX/TXT updates, and resolver-specific errors (NXDOMAIN, SERVFAIL, REFUSED, TIMEOUT). Use it during domain cutovers, CDN onboarding, mail provider changes, and incident response to reduce crawl disruptions and keep your website availability, indexing stability, and email delivery healthy.

Frequently Asked Questions

Is this the same as running dig once?

Not exactly. This tool checks many resolvers in parallel and compares their answers to show propagation consistency.

What does consensus mean?

Consensus is the percentage of queried resolvers that returned the most common answer set.

Why do I see mixed statuses across resolvers?

Propagation can be uneven, resolver caches differ, and some resolvers may rate-limit or time out depending on network conditions.

Can DNS propagation issues hurt SEO rankings?

Yes. If some resolvers return old or broken records, search engine crawlers may fail to reach your site reliably, causing crawl instability, indexing delays, and temporary ranking drops.

How long does DNS propagation usually take?

It depends on record TTL, resolver cache behavior, and provider infrastructure. Some updates appear in minutes, while others can take several hours.

Which DNS records matter most during website migration?

A/AAAA and CNAME are usually critical for web traffic, while NS and SOA affect delegation and zone authority. TXT and MX become essential when email/authentication changes are involved.

What should I do if one region still shows old records?

Keep the old infrastructure available during transition, verify TTL settings, and continue monitoring until consensus improves. Avoid removing legacy endpoints too early.

Does this tool replace full DNS monitoring?

No. It is a fast on-demand DNS propagation checker for diagnostics. Continuous monitoring and alerting are still recommended for production systems.

Why do TXT answers look truncated or quoted?

TXT records can be long and split into chunks at protocol level. The tool normalizes output for readability and may shorten very long values in the table view.