dns00.dns.t-ipnet.de has no CNAME records.
Question and response
Question
dig dns00.dns.t-ipnet.de. NS
Answer
The response has no answer records.
Authority
t-ipnet.de. 2604 SOA dns00.dns.t-ipnet.de. dns.telekom.de. 2026022001 10000 1800 3600000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0