Apex domains cannot have CNAME records.
Question and response
Question
dig brunico.com. NS
Answer
brunico.com. 5 NS ns-1393.awsdns-46.org.
brunico.com. 5 NS ns-1562.awsdns-03.co.uk.
brunico.com. 5 NS ns-188.awsdns-23.com.
brunico.com. 5 NS ns-990.awsdns-59.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0