Start with a [s]pecific DNS that you already know

The dnstracer command determines where a DNS gets its information from.
More information: <https://manned.org/dnstracer>.
Trick copyright: tl;dr; <https://github.com/tldr-pages/tldr>

dnstracer -s {{dns.example.org}} {{www.example.com}}

click the source code to copy install dnstracer on any operating system with command-not-found.com