Apex domains cannot have CNAME records.
Question and response
Question
dig xandovrix.com. NS
Answer
xandovrix.com. 5 NS ns-38.awsdns-04.com.
xandovrix.com. 5 NS ns-1681.awsdns-18.co.uk.
xandovrix.com. 5 NS ns-692.awsdns-22.net.
xandovrix.com. 5 NS ns-44.awsdns-05.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0