DNS Propagation Checker
Query the same DNS records across multiple public resolvers (Cloudflare, Google, Quad9) to spot propagation lag and stale caches — entirely from your browser.
Browser-only tool: queries public DNS-over-HTTPS resolvers directly from your machine. Coverage is limited to resolvers that allow browser access — useful for a quick consistency check, not a full worldwide propagation map.
Check consistency for a domain
Compare the A records for example.com across several resolvers to see whether everyone agrees.
Coverage is limited to resolvers that allow browser access — a quick consistency check rather than a full worldwide map.
FAQ
What is DNS propagation?
After you change a DNS record, resolvers that cached the old value keep serving it until the TTL expires. Propagation is the time it takes for the new value to reach every resolver.
Why do some resolvers disagree?
Each resolver caches independently and may have fetched your record at a different time. Disagreement usually means a recent change is still spreading, or a caching resolver is slow to refresh.
How long does propagation take?
It depends on the old record’s TTL and the domain’s TTL settings. Low TTLs (300s) can settle in minutes; hours is common and up to 48 hours is possible for some records.
How is this different from DNS Lookup?
DNS Lookup queries a single resolver. This tool queries several at once and compares them side by side, which is what surfaces propagation lag.