Apex domains cannot have CNAME records.
Question and response
Question
dig raffel.nl. NS
Answer
raffel.nl. 5 NS ns1.raffel.net.
raffel.nl. 5 NS ns5.raffel.nl.
Authority
The response has no authority records.
Additional
ns1.raffel.net. 2 A 94.103.156.16
ns5.raffel.nl. 5 A 136.144.162.95
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0