go
udns4.ausregistry.net.au has one IP number , which also has a corresponding reverse pointer. au, sa.au, nt.au, id.au, wa.au and at least 32 other hosts use this as a nameserver. ausregistry.net.au is a domain controlled by eight nameservers. All of them are on different IP networks. Incoming mail for ausregistry.net.au is handled by four mailservers at ausregistry.net.au themselves. Some of them are on the same IP network. ausregistry.net.au has one IP number. udns4.ausregistry.net.au is hosted on a server in United States even though the hostname implies Australia.

udns4.ausregistry.net.au
a records
 
+ 156.154.103.18 156.154.103.0/24 AS12008 -
+ --- -

ausregistry.net.au
a records
 
+ 202.65.12.105 202.65.12.0/24 AS18210  
+ ---  
ns-soa records
ns1.ausregistry.net.au
+ 202.65.12.73 202.65.12.0/24 AS18210 -
+ --- -
ns records
ns1.audns.net.au
+ 58.65.255.73 58.65.255.0/24 AS17987 -
+ --- -
ns2.audns.net.au
+ 58.65.249.73 58.65.249.0/24 AS45341 -
udns1.ausregistry.net.au
+ 156.154.100.18 156.154.100.0/24 AS12008 -
udns2.ausregistry.net.au
+ 156.154.101.18 156.154.101.0/24 AS12008 -
udns3.ausregistry.net.au
+ 156.154.102.18 156.154.102.0/24 AS12008 -
udns4.ausregistry.net.au
+ 156.154.103.18 156.154.103.0/24 AS12008 -
ns1.ausregistry.net.au
+ 202.65.12.73 202.65.12.0/24 AS18210 -
ns2.ausregistry.net.au
+ 202.65.13.73 202.65.13.0/24 AS38796 -
mx records
mx10-3.ausregistry.net.au
+ 202.65.13.90 202.65.13.0/24 AS38796  
+ ---  
mx10.ausregistry.net.au
+ 202.65.12.89 202.65.12.0/24 AS18210 dns1.ausregistry.net.au
+ --- dns1.ausregistry.net.au
mx10-1.ausregistry.net.au
+ 202.65.12.90 202.65.12.0/24 AS18210 -
+ --- -
mx10-2.ausregistry.net.au
+ 202.65.12.91 202.65.12.0/24 AS18210 -
ip numbers of host
156.154.103.18
ptrs of ip numbers
udns4.ausregistry.net.au
ip numbers using ptr to this host
156.154.103.18
domains using this as nameserver
act.au
act.edu.au
act.gov.au
asn.au
au
audns.net.au
ausregistry.net.au
cheapcampertrailerhire.com.au
com.au
edu.au
fli-rotary.org.au
gov.au
id.au
info.au
limestonecoastwineries.com.au
net.au
nsw.au
nsw.edu.au
nsw.gov.au
nt.au
nt.edu.au
org.au
qld.au
qld.edu.au
qld.gov.au
sa.au
sa.edu.au
sa.gov.au
sheceremonies.com.au
tas.au
tas.edu.au
vic.au
vic.edu.au
vic.gov.au
wa.au
wa.edu.au
wa.gov.au
used as nameserver but missing in parent delegation
cheapcampertrailerhire.com.au
fli-rotary.org.au
limestonecoastwineries.com.au
sheceremonies.com.au