go
ns-se.nic.hu has one IP number , but the reverse is hu1.dnsnode.net. hu1.dnsnode.net point to the same IP. hu use this as a nameserver. nic.hu is a domain controlled by two nameservers on different IP networks. Incoming mail for nic.hu is handled by one mailserver at iszt.hu. nic.hu has one IP number. ns-se.nic.hu is hosted on a server in Sweden even though the hostname implies Hungary.

ns-se.nic.hu
a records
 
+ 77.72.229.251 77.72.224.0/21 AS8674 hu1.dnsnode.net
+ --- hu1.dnsnode.net

nic.hu
a records
 
+ 193.239.149.113 193.239.149.0/24 AS12303  
+ ---  
ns-soa records
ns.iszt.hu
+ 193.239.149.116 193.239.149.0/24 AS12303 -
+ --- -
ns records
ns-s.nic.hu
+ 193.225.195.195 193.224.0.0/15 AS1955 ns.ppke.hu
+ --- ns.ppke.hu
ns.iszt.hu
+ 193.239.149.116 193.239.149.0/24 AS12303 -
+ --- -
mx records
deneb.iszt.hu
+ 193.239.149.6 193.239.149.0/24 AS12303 -
+ --- -
ip numbers of host
77.72.229.251
ptrs of ip numbers
hu1.dnsnode.net
hostnames sharing ip with a-records
hu1.dnsnode.net
domains using this as nameserver
hu