http://y7egb5vi45k74makeixpfb7jnimfxm3gf233lb3ke2ldonozjk55nvad.onion/notes_on_dns.html
This is
actually necessary, because the “resolvers” built into computer programs
that use DNS, usually through the c libraries gethostbyname() function,
cannot use a non-recursive server. So, you might naturally wonder, what does a non-recursive server do
when queried for some portion of the namespace it doesn’t own. Lets find
out: dig @f.root-servers.net lainchan.org
; <<>> DiG 9.11.24-RedHat-9.11.24-2.fc32 <<>> @f.root-servers.net lainchan.org
; (2 servers found)
;; global options:...