Apex domains cannot have CNAME records.
Question and response
Question
dig nuriacienfuegos.com. NS
Answer
nuriacienfuegos.com. 4 NS ns-1023.awsdns-63.net.
nuriacienfuegos.com. 4 NS ns-1484.awsdns-57.org.
nuriacienfuegos.com. 4 NS ns-491.awsdns-61.com.
nuriacienfuegos.com. 4 NS ns-840.awsdns-41.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0