Unrecognized hosts

[athenian]

Hello. I see in the domain stats that a substantial amount of entries are related to 

152.211.71.52.in-addr.arpa 

DoD Network Information Center (DNIC)

141.183.221.3.in-addr.arpa 

Headquarters, USAISC (HEADQU-3)

As these seem to be military sites and I do not know why I am resolving to them.

Any ideas?

[rotblitz]

These are reverse DNS lookups, i.e. obtaining the hostnames for the IP addresses 52.71.211.154 and 3.221.183.141.  I do not know either why an app in your network raises these DNS lookups.  But it looks like the destinations are on Amazon AWS.

nslookup 52.71.211.154
Server:  local
Address:  10.1.1.1

Name:    ec2-52-71-211-154.compute-1.amazonaws.com
Address:  52.71.211.154


nslookup 3.221.183.141
Server: local
Address: 10.1.1.1

Name:    ec2-3-221-183-141.compute-1.amazonaws.com
Address:  3.221.183.141

No idea why you think that these are military destinations.

https://52.71.211.154/login leads to a login page for an analytics service.

https://3.221.183.141/ leads to another website which has no document at this URL (HTTP error 404).