go
owa.bom.gov.au has one IP number , via cname to bom-vcas-ho.bom.gov.au. owa07.bom.gov.au point to the same IP. bom.gov.au is a domain controlled by three nameservers. All of them are on different IP networks. Incoming mail for bom.gov.au is handled by two mailservers at bom.gov.au themselves. They are on different IP networks. owa.bom.gov.au is hosted on a server in Australia.

owa.bom.gov.au
cname records
bom-vcas-ho.bom.gov.au
+ 134.178.14.162 134.178.0.0/17 AS23667  
+ ---  

bom.gov.au
ns-soa records
ho-dns-ext.bom.gov.au
+ 134.178.63.126 134.178.0.0/17 AS23667 -
+ --- -
ns records
ns1.unimelb.edu.au
+ 128.250.20.2 128.250.0.0/16 AS10148 -
+ --- -
drs-dns-ext.bom.gov.au
+ 134.178.253.126 134.178.128.0/17 AS23667 -
ho-dns-ext.bom.gov.au
+ 134.178.63.126 134.178.0.0/17 AS23667 -
mx records
drs-mailfilter2.bom.gov.au
+ 134.178.253.184 134.178.128.0/17 AS23667  
+ ---  
ho-mailfilter2.bom.gov.au
+ 134.178.63.184 134.178.0.0/17 AS23667  
ip numbers of host
134.178.14.162
hostnames sharing ip with a-records
bom-vcas-ho.bom.gov.au
owa07.bom.gov.au
cname
bom-vcas-ho.bom.gov.au