DNS Propagation
Compare a DNS record across 8 public resolvers to spot propagation gaps.
No results yet
Enter a domain above and press Run to start the check.
About the DNS Propagation
DNS Propagation queries a single record across eight major public resolvers, including Google, Cloudflare, Quad9, and OpenDNS, and compares their answers side by side. This reveals whether a recent DNS change has been picked up consistently or whether some resolvers are still serving cached, stale data. Note that it checks one record from many resolvers, not from many geographic locations, so it measures resolver-level consistency rather than worldwide reach.
How to use
- Enter the domain and choose the record type you changed or want to verify.
- Run the check to query all eight public resolvers in parallel.
- Compare the returned values to spot any resolvers still serving old data.
- Wait for the record's TTL to elapse and re-run until all answers agree.
Frequently asked questions
- How long does DNS propagation take?
- It depends largely on the record's TTL, since resolvers cache answers for that duration. Changes often appear within minutes but can take up to a day for high TTLs.
- Does this tool check different geographic locations?
- No. It queries multiple public resolvers from one server, so it compares resolver answers rather than results from different regions.
- Why do some resolvers show different results?
- A resolver may still hold the previous record in its cache until the TTL expires. Once it expires, it fetches the updated value from the authoritative servers.