Apex domains cannot have CNAME records.
Question and response
Question
dig xalzanquloria.com. NS
Answer
xalzanquloria.com. 1 NS ns-263.awsdns-32.com.
xalzanquloria.com. 1 NS ns-2015.awsdns-59.co.uk.
xalzanquloria.com. 1 NS ns-706.awsdns-24.net.
xalzanquloria.com. 1 NS ns-2016.awsdns-60.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0