vhost5.gn2-server.de has no CNAME records.
Question and response
Question
dig vhost5.gn2-server.de. NS
Answer
The response has no answer records.
Authority
gn2-server.de. 3054 SOA a.ns14.net. support.gn2.de. 2026011303 43200 7200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0