Apex domains cannot have CNAME records.
Question and response
Question
dig disenopublico.com. NS
Answer
disenopublico.com. 5 NS ns-1786.awsdns-31.co.uk.
disenopublico.com. 5 NS ns-1152.awsdns-16.org.
disenopublico.com. 5 NS ns-1069.awsdns-05.org.
disenopublico.com. 5 NS ns-1723.awsdns-23.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0