go
www.advantage.net.au has one IP number , via cname to advantage.net.au , but the reverse is atom.mkndns.net. mail.norteal.com, cichlidcity.com.au, mail.coburginitiative.com, mail.thecoburginitiative.com, mail.coburginitiative.com.au and at least one other host point to the same IP. advantage.net.au is a domain controlled by two nameservers at mkndns.net. They are on the same IP network. Incoming mail for advantage.net.au is handled by one mailserver at net.au. advantage.net.au has one IP number. www.advantage.net.au is hosted on a server in United States even though the hostname implies Australia.

www.advantage.net.au
cname records
advantage.net.au
+ 63.247.141.41 63.247.140.0/22 AS19271 atom.mkndns.net
+ --- atom.mkndns.net

advantage.net.au
a records
 
+ 63.247.138.169 63.247.136.0/22 AS19271  
+ ---  
ns-soa records
ns1.mkndns.net
+ 63.247.129.201 63.247.128.0/22 AS19271 -
+ --- -
ns records
ns1.mkndns.net
+ 63.247.129.201 63.247.128.0/22 AS19271 -
+ --- -
ns2.mkndns.net
+ 63.247.129.202 63.247.128.0/22 AS19271 -
mx records
advantage.net.au
+ 63.247.138.169 63.247.136.0/22 AS19271  
+ ---  
ip numbers of host
63.247.141.41
ptrs of ip numbers
atom.mkndns.net
ip numbers using ptr to this host
203.58.62.27
hostnames sharing ip with a-records
cichlidcity.com.au
mail.coburginitiative.com
mail.coburginitiative.com.au
mail.norteal.com
mail.thecoburginitiative.com
mail.thecoburginitiative.com.au
cname
advantage.net.au
domains using this as mailserver under another name
cichlidcity.com.au
coburginitiative.com
coburginitiative.com.au
thecoburginitiative.com
thecoburginitiative.com.au