go
hsrp-dnsflow.sth.nic.cz has one IP number , which also has a corresponding reverse pointer. e.ns.nic.cz and e.ns.cznic.org point to the same IP. hsrp-dnsflow.sth.nic.cz is hosted on a server in Sweden even though the hostname implies Czech Republic.

hsrp-dnsflow.sth.nic.cz
a records
 
+ 194.146.105.38 194.146.105.0/24 AS8674 -
+ --- -
ip numbers of host
194.146.105.38
ptrs of ip numbers
hsrp-dnsflow.sth.nic.cz
ip numbers using ptr to this host
194.146.105.38
hostnames sharing ip with a-records
e.ns.cznic.org
e.ns.nic.cz
domains using this as nameserver under another name
0.2.4.e164.arpa
cz