*.t.aldem.nrw.net has no CNAME records.
Question and response
Question
dig *.t.aldem.nrw.net. NS
Answer
The response has no answer records.
Authority
nrw.net. 295 SOA a.ns.nrw.net. hostmaster.joker.com. 2026030235 14400 3600 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0