go
smtp.thomson.com.au has one IP number , which also has a corresponding reverse pointer. thomson.com.au is delegated to three nameservers, however one extra nameserver is listed in the zone. All nameservers are at tlr.net.au. Two of them are on the same IP network. Incoming mail for thomson.com.au is handled by four mailservers. Some of them are on the same IP network. smtp.thomson.com.au is hosted on a server in Australia.

smtp.thomson.com.au
a records
 
+ 202.27.91.70 202.27.91.0/24 AS9219 -
+ --- -

thomson.com.au
ns-soa records
ns3.tlr.net.au
+ 202.69.219.24 202.69.219.0/24 AS9219  
+ ---  
ns records
ns7.tlr.net.au
+ 202.69.208.30 202.69.208.0/21 AS9219  
+ ---  
ns5.tlr.net.au
+ 202.27.88.69 202.27.88.0/24 AS24183  
ns3.tlr.net.au
+ 202.69.219.24 202.69.219.0/24 AS9219  
ns4.tlr.net.au
+ 202.69.219.25 202.69.219.0/24 AS9219  
mx records
mx1.thomson.com.au
+ 202.69.219.26 202.69.219.0/24 AS9219 -
+ --- -
mx2.thomson.com.au
+ 202.69.219.27 202.69.219.0/24 AS9219 -
syd-msggw-01.tlr.net.au
+ 202.69.221.2 202.69.220.0/22 AS9219 -
syd-msggw-02.tlr.net.au
+ 202.69.220.2 202.69.220.0/22 AS9219 -
ip numbers of host
202.27.91.70
ptrs of ip numbers
smtp.thomson.com.au
ip numbers using ptr to this host
202.27.91.70
nameservers missing in parent delegation
ns5.tlr.net.au