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DNS Propagation Checker

Query a record across multiple public resolvers and compare answers.

Why this exists

Mid-cutover, the question is 'has it propagated?'. Querying several public resolvers at once and seeing where answers disagree tells you whether you're waiting on TTLs or staring at a misconfiguration.

How to use
  1. Enter a domain and choose a record type (A, MX, TXT, CNAME, NS).
  2. Tool queries several public resolvers (Cloudflare, Google, Quad9, and more) in parallel.
  3. Compare the answers side by side, mismatches are flagged.

Worked example

Try microsoft.com with MX, the same record is queried against Cloudflare, Google, AdGuard, and NextDNS at once so you can see whether a change has propagated everywhere.