con2.nipr.mil has no CNAME records.
Question and response
Question
dig con2.nipr.mil. NS
Answer
The response has no answer records.
Authority
nipr.mil. 1071 SOA dns1.nipr.mil. hostmaster\@nic.mil. 37633 21600 3600 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0