undefined.utg.link has no CNAME records.
Question and response
Question
dig undefined.utg.link. NS
Answer
The response has no answer records.
Authority
link. 21 SOA ns.trs-dns.com. trs-ops.tucows.com. 1771739910 1800 900 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0