nsa.n0c.com has no CNAME records.
Question and response
Question
dig nsa.n0c.com. NS
Answer
The response has no answer records.
Authority
n0c.com. 2911 SOA nsa.n0c.com. hostmaster.n0c.com. 2026030711 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0