go
ns3.communitydns.net has one IP number , which also has a corresponding reverse pointer. c.nic.ir point to the same IP. communitydns.net is a domain controlled by three nameservers. All of them are on different IP networks. Incoming mail for communitydns.net is handled by three mailservers. Two of them are on the same IP network. communitydns.net has two IP numbers. They are on different IP networks. ns3.communitydns.net is hosted on a server in United Kingdom.

ns3.communitydns.net
a records
 
+ 194.0.1.3 194.0.1.0/24 AS42909 -
+ --- -

communitydns.net
a records
 
+ 91.208.95.79 91.208.95.0/24 AS23352  
+ ---  
+ 193.223.78.62 193.223.78.0/24 AS21396  
ns-soa records
 
+   AS?  
+ ---  
ns records
ns3.icb.co.uk
+ 91.208.95.130 91.208.95.0/24 AS23352  
+ ---  
ns1.communitydns.net
+ 194.0.1.1 194.0.1.0/24 AS42909 -
+ --- -
ns1.inone.com
+ 192.16.192.101 192.16.192.0/24 AS1104 box1.icb.co.uk
+ --- box1.icb.co.uk
mx records
srvc131.icb.co.uk
+ 91.208.95.131 91.208.95.0/24 AS23352 -
+ --- -
serv37.icb.co.uk
+ 193.223.78.37 193.223.78.0/24 AS21396 -
mx.communitydns.net
+ 193.223.78.34 193.223.78.0/24 AS21396 serv34.icb.co.uk
+ --- serv34.icb.co.uk
ip numbers of host
194.0.1.3
ptrs of ip numbers
ns3.communitydns.net
ip numbers using ptr to this host
194.0.1.3
hostnames sharing ip with a-records
c.nic.ir
domains using this as nameserver under another name
ac.ir