Apex domains cannot have CNAME records.
Question and response
Question
dig fuccillokiaclay.com. NS
Answer
fuccillokiaclay.com. 4 NS ns-103.awsdns-12.com.
fuccillokiaclay.com. 4 NS ns-1967.awsdns-53.co.uk.
fuccillokiaclay.com. 4 NS ns-797.awsdns-35.net.
fuccillokiaclay.com. 4 NS ns-597.awsdns-10.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0