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DNS lookup
Inspect A, AAAA, CNAME, MX, TXT, NS, and CAA records including TTLs.
When to use DNS lookup
Use this tool for propagation checks, hostname migration validation, and incident triage when services appear up for some users but down for others. Record-level visibility helps you separate DNS issues from application failures.
Propagation checks
Compare current records and TTL values after changes to estimate how long stale answers may persist.
Resolver comparison
Run against a specific resolver to detect cache divergence or geo-based answer differences.
Operational follow-up
Correlate DNS findings with Uptime Check and Domain IP Lookup to verify real request paths.
FAQ
Which records first?
Start with A/AAAA for web reachability, then inspect CNAME, MX, TXT, NS, and CAA based on your symptom.
Why TTL matters?
TTL defines resolver cache duration, so high values can keep old answers visible after zone changes.
Different answers by resolver?
That can be normal during propagation or in geo-aware DNS setups, but it should match your intended architecture.
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