DNS Propagation Checker - Compare Global Resolvers Online
DNS Propagation Checker
Compare a DNS Record Across Major Public Resolvers
Ready to Check
Enter a domain and record type above to compare public resolvers.
Understanding DNS Propagation
Post-Change Verification
After updating a DNS record, confirm the new value has actually reached major resolvers before troubleshooting further.
Multi-Resolver Comparison
Different resolvers cache records independently — comparing several at once reveals inconsistency at a glance.
Migration Confidence
Verify a domain migration's DNS changes are visible from all major public resolvers before decommissioning the old server.
Direct Resolver Queries
Queries each public resolver directly (bypassing local caching) for an accurate, real-time comparison.
Why Results Can Differ Across Resolvers
Each public resolver maintains its own cache, governed by the Time To Live (TTL) value on the DNS record. If you changed a record recently, a resolver that cached the old value before your change won't reflect the new one until its cached copy expires. This is expected, temporary behavior that typically resolves within the record's configured TTL.
Key Takeaways
- Four Major Resolvers: Compares Google, Cloudflare, Quad9, and OpenDNS in a single check.
- Bypasses Local Cache: Queries each resolver's IP directly rather than through your own DNS cache.
- SSRF-Protected: Domain resolution is validated before any resolver query is issued.