rt.hq.dca.net has no CNAME records.
Question and response
Question
dig rt.hq.dca.net. NS
Answer
The response has no answer records.
Authority
hq.dca.net. 600 SOA dns.dca.net. hostmaster.dca.net. 2025001202 10800 3600 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0