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DNS propagation checker

Query several major public resolvers at once and compare their answers side by side to see whether a DNS change has reached the caches.

Type a domain and press Check propagation
The four answers are what each resolver's cache holds right now, shown side by side.

DNS has no push step to watch: a resolver answers from its cache until the record's TTL runs out, then asks the authoritative servers again. That is why a change “propagates” at different moments per resolver, and why a mixed result here is normal mid-transition behavior rather than a fault; the TTL window in the result is how long the disagreement can last. This tool compares four well-known public resolvers, not every resolver worldwide, and it cannot see your own ISP's cache or a resolver that ignores TTLs. If a resolver's endpoint refuses browser cross-origin reads, its row says unavailable instead of quietly disappearing.
OptionsCheck propagation

More network tools

- Live DNS lookup (/network/dns)
- DNS explainer (/network/dns-explain)
- What is my IP (/network/my-ip)
All network tools (/network)

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Canonical HTML: https://nutter.tools/network/dns-propagation-checker
Markdown version: https://nutter.tools/network/dns-propagation-checker.md
Plain-text version: https://nutter.tools/network/dns-propagation-checker.txt
Agent index: https://nutter.tools/llms.txt