Apex domains cannot have CNAME records.
Question and response
Question
dig arneswinnen.com. NS
Answer
arneswinnen.com. 5 NS ns4cjp.name.com.
arneswinnen.com. 5 NS ns1jlp.name.com.
arneswinnen.com. 5 NS ns2dqr.name.com.
arneswinnen.com. 5 NS ns3fqs.name.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0