ns3.this-dns.net has no CNAME records.
Question and response
Question
dig ns3.this-dns.net. NS
Answer
The response has no answer records.
Authority
this-dns.net. 300 SOA ns1.this-dns.net. dns-soa.doesnotaccept.email. 2020090502 300 180 300 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0