dns2.sentia.dk has no CNAME records.
Question and response
Question
dig dns2.sentia.dk. NS
Answer
The response has no answer records.
Authority
sentia.dk. 875 SOA ns.jay.net. dns.sentia.dk. 2026030104 14400 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0