CIDR Calc

DNS Triage

Work through DNS issues in the right order and surface likely failure points.

Back to toolsCIDR Calc

Local resolver

Does nslookup/dig against your configured resolver return an answer?

Public resolvers

Do Google/Cloudflare public resolvers return the correct answer?

Authoritative servers

Do the authoritative nameservers return the correct records?

Caching/TTL

Is the issue caused by stale cache or low TTL propagation?

Guidance

Next best step

Start with your local resolver and network reachability.
Tip: Always test authoritative servers before caching layers to avoid misleading results.