Apex domains cannot have CNAME records.
Question and response
Question
dig palmierengenharia.com. NS
Answer
palmierengenharia.com. 5 NS ns-1893.awsdns-44.co.uk.
palmierengenharia.com. 5 NS ns-1312.awsdns-36.org.
palmierengenharia.com. 5 NS ns-84.awsdns-10.com.
palmierengenharia.com. 5 NS ns-542.awsdns-03.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0