node42.dbnoc.net has no CNAME records.
Question and response
Question
dig node42.dbnoc.net. NS
Answer
The response has no answer records.
Authority
dbnoc.net. 5664 SOA dns1.hrnoc.net. hostmaster.hrnoc.net. 2026012701 28800 7200 2419200 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0