go
smtp2.dscc.dla.mil has one IP number , which also has a corresponding reverse pointer. dla.mil use this as a mailserver. dscc.dla.mil is a domain controlled by two nameservers at dla.mil. They are on different IP networks. smtp2.dscc.dla.mil is hosted on a server in United States.

smtp2.dscc.dla.mil
a records
 
+ 214.3.139.5 214.0.0.0/8 AS27064 -
+ --- -

dscc.dla.mil
ns-soa records
ns1.dla.mil
+ 206.38.35.3 206.38.0.0/16 AS27064 -
+ --- -
ns records
ns1.dla.mil
+ 206.38.35.3 206.38.0.0/16 AS27064 -
+ --- -
ns4.dla.mil
+ 131.78.81.254 131.76.0.0/14 AS27064 -
ip numbers of host
214.3.139.5
ptrs of ip numbers
smtp2.dscc.dla.mil
ip numbers using ptr to this host
214.3.139.5
domains using this as mailserver
dla.mil