go
c.ns.nic.cz and c.ns.cznic.org point to 195.66.241.202.

c.ns.cznic.org
a records
 
+ 195.66.241.202 195.66.224.0/19 AS5459 c.ns.nic.cz
+ --- c.ns.nic.cz

c.ns.nic.cz
a records
 
+ 195.66.241.202 195.66.224.0/19 AS5459 -
+ --- -
ip numbers of host
195.66.241.202
ptrs of ip numbers
c.ns.nic.cz
hostnames sharing ip with a-records
c.ns.cznic.org
c.ns.nic.cz
domains using this as nameserver
0.2.4.e164.arpa
cz
cznic.eu
cznic.org