Apex domains cannot have CNAME records.
Question and response
Question
dig der-steppenwolf.com. NS
Answer
der-steppenwolf.com. 5 NS ns1.der-steppenwolf.com.
der-steppenwolf.com. 5 NS ns2.der-steppenwolf.com.
Authority
The response has no authority records.
Additional
ns1.der-steppenwolf.com. 5 A 81.28.99.11
ns2.der-steppenwolf.com. 5 A 173.44.158.35
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0