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DNS Propagation Check - Global DNS Propagation Checker
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DNS Propagation Checker
Check how DNS records propagate across 8+ global resolvers including Google, Cloudflare, Quad9, and OpenDNS. Supports A, AAAA, MX, CNAME, TXT, and NS record types. Consensus analysis highlights servers that return different values — essential for diagnosing DNS change delays and CDN/load-balancer misconfigurations.
How It Works
Parallel DNS queries are sent to 8+ public resolvers worldwide. Each resolver's response is compared against the consensus value. Discrepancies are flagged with the resolver name and returned value. This reveals which regions have received the updated record and which are still serving the old cached version.
FAQ
How long does DNS propagation take?
Typically 5 minutes to 48 hours, depending on the record's TTL (Time To Live). Records with a 300-second TTL propagate within minutes. Records with a 86400-second (24-hour) TTL may take up to a day. Before making DNS changes, lower the TTL in advance to speed up propagation.
Why do different resolvers show different values?
Each resolver caches DNS responses independently based on the TTL. After a DNS change, resolvers that haven't had their cache expire yet will still return the old value. Once the TTL expires, they query the authoritative server and get the updated record.
My DNS change shows propagated but the site still shows old content — why?
This is likely browser or OS-level DNS cache. Try flushing your local DNS cache (ipconfig /flushdns on Windows, sudo dscacheutil -flushcache on macOS). Also check if a CDN layer is caching the old content independently of DNS.
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Tool Features
Related Guides
Coming Soon DNS change detection alerts — coming soon.