auth01.ns.tele.dk has no CNAME records.
Question and response
Question
dig auth01.ns.tele.dk. NS
Answer
The response has no answer records.
Authority
tele.dk. 6690 SOA auth01.ns.tele.dk. dns.eng.tdc.net. 2025121000 3600 1800 3600000 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0