DNS Propagation Checker
NEWInstantly check whether your DNS changes have propagated by querying both Google (8.8.8.8) and Cloudflare (1.1.1.1) public resolvers side-by-side. Get an AGREE or propagating status so you know exactly when your records are live.
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Checked against Google and Cloudflare public resolvers. Full global propagation may take up to 48 hours.
How to use DNS Propagation Checker
- Enter the domain name you want to check (e.g. example.com or mail.example.com).
- Select the DNS record type — A, AAAA, CNAME, MX, TXT, NS, SOA, or CAA.
- Click Check Propagation to query Google and Cloudflare simultaneously and see if they agree.
What is DNS Propagation Checker?
When you update a DNS record — changing your A record, adding an MX entry, or modifying a CNAME — the change must propagate across the global network of resolvers before all visitors see the new values. This can take anywhere from a few minutes to 48 hours depending on the TTL of the old record.
This tool queries Google DNS and Cloudflare DNS simultaneously using their public DNS-over-HTTPS (DoH) APIs. If both resolvers return identical answers, your change has reached at least these two major resolvers and is well on its way to full propagation. A mismatch means propagation is still in progress.
FAQ
- Why do Google and Cloudflare show different answers?
- Each resolver independently caches DNS responses based on the TTL of each record. When you update a record, the old cached value may still be served until the TTL expires, so the two resolvers may temporarily disagree during the propagation window.
- How long does DNS propagation take?
- Propagation time depends on the TTL of the previous record. Low TTLs (300 s) resolve in minutes; high TTLs (86400 s, i.e. 24 h) can take up to 48 hours for all caches worldwide to refresh.
- Does this tool check all global DNS servers?
- This tool checks Google Public DNS and Cloudflare DNS, two of the most widely used resolvers in the world. For a comprehensive global check across dozens of locations you would need a dedicated monitoring service; this tool gives you a quick, reliable signal from two authoritative public resolvers.
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