Google Chrome DNS – How to Clear/Flush the DNS Cache

dig has no cache of its own, unless you run some caching daemon locally such as nsdc or dnsmasq etc. if you do you just need to restart these daemons to clear the local cache. you can use +trace to see exactly where the results are coming from.

According to Opera's Senior Developer, Yngve Nysæter Pettersen, the DNS cache in Opera is 10 minutes and there's no means (that he cares to share) to clear it.

That's extremely inconvenient. And my trial and error shows that closing and opening the browser (whole browser, not just tab) successfully cleared the cache immediately.

He's wrong when he says that this is the same on every other browser. This may be true in Chrome as they rip settings every day, but Firefox has network.dnsCacheExpiration with is miliseconds for DNS cache TTL. (This is not documented or shown with the default value when you go to about:config, but still existent.)