Apex domains cannot have CNAME records.
Question and response
Question
dig edicc.de. NS
Answer
edicc.de. 5 NS ns-109-a.gandi.net.
edicc.de. 5 NS ns-155-c.gandi.net.
edicc.de. 5 NS ns-175-b.gandi.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0