ns.t26.dk has no CNAME records.
Question and response
Question
dig ns.t26.dk. NS
Answer
The response has no answer records.
Authority
t26.dk. 2504 SOA AUTH1.t26.dk. support.globalconnect.dk. 2007102755 86400 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0