_netlist.demo-use1.docebomail.com has no CNAME records.
Question and response
Question
dig _netlist.demo-use1.docebomail.com. NS
Answer
The response has no answer records.
Authority
demo-use1.docebomail.com. 292 SOA ns-810.awsdns-37.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0