Use a DNS Trace to see how your domain is resolved from your system (browser or terminal) to the name server authoritative for your domain. On the way, you’ll see results from the resolving name server, TLD (top level domain) server, and root name server. This is a great way to get full visibility of how queries for your domain are resolved.
If you want to learn more about how the different servers required to resolve a DNS query, check out
How DNS Works.