go
ns2.gnvfc.com has one IP number. gnfc.in and gnvfc.com use this as a nameserver. gnvfc.com is a domain controlled by two nameservers at gnvfc.com themselves. They are on different IP networks. ns2.gnvfc.com is hosted on a server in India.

ns2.gnvfc.com
a records
 
+ 220.225.151.185 220.225.151.0/24 AS18101  
+ ---  

gnvfc.com
ns-soa records
ns1.gnvfc.com
+ 210.212.133.105 210.212.128.0/20 AS9829 -
+ --- -
ns records
ns1.gnvfc.com
+ 210.212.133.105 210.212.128.0/20 AS9829 -
+ --- -
ns2.gnvfc.com
+ 220.225.151.185 220.225.151.0/24 AS18101  
+ ---  
ip numbers of host
220.225.151.185
ip numbers using ptr to this host
210.212.133.106
domains using this as nameserver
gnfc.in
gnvfc.com