static.95.91.21.65.clients.your-server.de has no CNAME records.
Question and response
Question
dig static.95.91.21.65.clients.your-server.de. NS
Answer
The response has no answer records.
Authority
91.21.65.clients.your-server.de. 8935 SOA ns1.your-server.de. dns.hetzner.com. 2020120931 14400 1800 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0