ns2.nameserverservice.de has no CNAME records.
Question and response
Question
dig ns2.nameserverservice.de. NS
Answer
The response has no answer records.
Authority
nameserverservice.de. 2560 SOA ns1.nameserverservice.de. hostmaster.ns1.nameserverservice.de. 2024101600 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0