go
d.ns.nic.cz has one IP number , which also has a corresponding reverse pointer. d.ns.cznic.org point to the same IP. cz, nic.cz, dnssec.cz, dnstester.cz, dns-tester.cz and at least three other hosts use this as a nameserver. d.ns.nic.cz is hosted on a server in Czech Republic.

d.ns.nic.cz
a records
 
+ 193.29.206.1 193.29.206.0/24 AS25192 -
+ --- -
ip numbers of host
193.29.206.1
ptrs of ip numbers
d.ns.nic.cz
ip numbers using ptr to this host
193.29.206.1
hostnames sharing ip with a-records
d.ns.cznic.org
domains using this as nameserver
0.2.4.e164.arpa
cz
dns-tester.cz
dnssec-tester.cz
dnssec.cz
dnstester.cz
nic.cz
signed.dnstester.cz
used as nameserver but missing in parent delegation
0.2.4.e164.arpa
used as nameserver but missing in zone
dnssec.cz