Apex domains cannot have CNAME records.
Question and response
Question
dig ediscom.net. NS
Answer
ediscom.net. 5 NS ns3.ediscom.de.
ediscom.net. 5 NS ns4.ediscom.de.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0