idaprof.ads-tec.de has no CNAME records.
Question and response
Question
dig idaprof.ads-tec.de. NS
Answer
The response has no answer records.
Authority
ads-tec.de. 3486 SOA pns.dtag.de. dns.telekom.de. 2026022700 10800 3600 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0