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I'm wondering if there is a way to query a DNS server and bypass caching (with dig). Often I change a zone on the DNS server and I want to check if it resolves correctly from my workstation. But since the server caches resolved requests, I often get the old ones. Restarting or -loading the server is not really something nice.

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up vote 16 down vote accepted

You can use the @ syntax to look up the domain from a particular server. If the DNS server is authoritative for that domain, the response will not be a cached result.

dig @ns1.example.com example.com

You can find the authoritative servers by asking for the NS records for a domain:

dig example.com NS
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Oh okay. Yeah I was familiar with the @ syntax, but haven't had the idea to query the authoritative server instead. Thanks! –  Daniel Mar 21 '12 at 17:22
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Side note: in cases where you're trying to see what responses a caching server would get, +norecurse is recommended. +recurse is on by default will occasionally change the way a DNS server interprets your question entirely. –  Andrew B Mar 1 '13 at 4:37
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