Apex domains cannot have CNAME records.
Question and response
Question
dig dnswnd.eu. NS
Answer
dnswnd.eu. 2 NS ns-205.awsdns-25.com.
dnswnd.eu. 2 NS ns-1235.awsdns-26.org.
dnswnd.eu. 2 NS ns-963.awsdns-56.net.
dnswnd.eu. 2 NS ns-1850.awsdns-39.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0