go
ric1s-c039.dscr.dla.mil has one IP number , which also has a corresponding reverse pointer. dla.mil use this as a mailserver. dscr.dla.mil is a domain controlled by two nameservers at dla.mil. They are on different IP networks. Incoming mail for dscr.dla.mil is handled by one mailserver at dscr.dla.mil themselves. ric1s-c039.dscr.dla.mil is hosted on a server in United States.

ric1s-c039.dscr.dla.mil
a records
 
+ 206.38.37.41 206.38.0.0/16 AS27064 -
+ --- -

dscr.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 -
mx records
ric1s-c036.dscr.dla.mil
+ 206.38.37.28 206.38.0.0/16 AS27064 -
+ --- -
ip numbers of host
206.38.37.41
ptrs of ip numbers
ric1s-c039.dscr.dla.mil
ip numbers using ptr to this host
206.38.37.41
domains using this as mailserver
dla.mil