http://y7egb5vi45k74makeixpfb7jnimfxm3gf233lb3ke2ldonozjk55nvad.onion/notes_on_dns.html
We see this below in the format used in popular DNS
Server, BIND ( Berkeley Internet Name Daemon ) for its databases or
“zones”. lainchan.org. 1800 IN A 107.161.19.243 We see that lainchan.org has a TTL of 1800 seconds (30 minutes), has
a class of Internet (as compared to other dead classes like choasnet),
and its A record (mapping lainchan.org to a host name) has the value
107.161.19.243. We can also do this backward with PTR records, which turn an IP
Address...