Root zone
These servers manage the DNS root zone
in-addr.arpa.
These servers manage the in-addr.arpa zone
206.in-addr.arpa.
These servers manage the 206.in-addr.arpa zone
77.71.206.in-addr.arpa.
These servers manage the 77.71.206.in-addr.arpa zone
0-127.77.71.206.in-addr.arpa.
These servers manage the 0-127.77.71.206.in-addr.arpa zone