WHOIS / RDAP lookup
Open ICANN registration data lookup for a domain.
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Nameserver lookup
Find the public nameservers for a domain.
Submitting sends this domain to Google Public DNS. No account or API key is needed.
Templates and calculations run locally in your browser. No generative AI or paid API is used. Review results before use.
Understand the DNS result
Each returned record includes a value and a time to live (TTL) in seconds. The result is what Google Public DNS returned at the time of your request, not a complete view of every resolver.
A practical example
Try a domain you administer in the nameserver lookup. If you recently changed records, allow for existing cached records to expire before comparing results.
What this tool cannot tell you
Authoritative nameservers host a domain’s DNS zone. Hosting and registration may use different providers.
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