Root zone
These servers manage the DNS root zone
in-addr.arpa.
These servers manage the in-addr.arpa zone
202.in-addr.arpa.
These servers manage the 202.in-addr.arpa zone
212.202.in-addr.arpa.
These servers manage the 212.202.in-addr.arpa zone
23.212.202.in-addr.arpa.
These servers manage the 23.212.202.in-addr.arpa zone
sub176.23.212.202.in-addr.arpa.
These servers manage the sub176.23.212.202.in-addr.arpa zone