Apex domains cannot have CNAME records.
Question and response
Question
dig contradaradicozzo.com. NS
Answer
contradaradicozzo.com. 5 NS ns-393.awsdns-49.com.
contradaradicozzo.com. 5 NS ns-56.awsdns-07.com.
contradaradicozzo.com. 5 NS ns-1482.awsdns-57.org.
contradaradicozzo.com. 5 NS ns-444.awsdns-55.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0