Apex domains cannot have CNAME records.
Question and response
Question
dig dvvzoetermeer.com. NS
Answer
dvvzoetermeer.com. 5 NS ns-1138.awsdns-14.org.
dvvzoetermeer.com. 5 NS ns-839.awsdns-40.net.
dvvzoetermeer.com. 5 NS ns-1029.awsdns-00.org.
dvvzoetermeer.com. 5 NS ns-1134.awsdns-13.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0