ns2.dnspartner.de has no CNAME records.
Question and response
Question
dig ns2.dnspartner.de. NS
Answer
The response has no answer records.
Authority
dnspartner.de. 4969 SOA ns1.dnspartner.de. hostmaster.speedpartner.de. 2026022601 28800 14400 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0