Apex domains cannot have CNAME records.
Question and response
Question
dig 104army.de. NS
Answer
104army.de. 5 NS edna.ns.cloudflare.com.
104army.de. 5 NS ken.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0