Apex domains cannot have CNAME records.
Question and response
Question
dig xalvoraq.com. NS
Answer
xalvoraq.com. 4 NS ns-1421.awsdns-49.org.
xalvoraq.com. 4 NS ns-691.awsdns-22.net.
xalvoraq.com. 4 NS ns-331.awsdns-41.com.
xalvoraq.com. 4 NS ns-495.awsdns-61.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0