AlherPulse tools Beta

How to use DNS Propagation: enter a domain, choose records to compare, set All Resolvers, and review differences.

DNS record types to query
Select DNS Resolver

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Enter a domain to start the diagnostic.

DNS propagation checker guide

What is this checker for?

It helps you validate how a DNS change is propagating across resolvers and regions. You can spot response mismatches, stale cache, or delays before considering a rollout complete.

How to use it

  • Enter your main domain (example: mydomain.com).
  • Select the record types you want to compare (A, AAAA, MX, TXT, NS, SOA, etc.).
  • Keep "All Resolvers" enabled to compare public providers.
  • Click "Analyze Pulse" and review values, TTL, and responding servers.