ns1.cdnetdns.net has no CNAME records.
Question and response
Question
dig ns1.cdnetdns.net. NS
Answer
The response has no answer records.
Authority
cdnetdns.net. 8 SOA b.qtlcdncn.info. dnsadmin.cdnetworks.com. 2023080801 3600 900 604800 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0