Apex domains cannot have CNAME records.
Question and response
Question
dig adversal.org. NS
Answer
adversal.org. 5 NS ns-1464.awsdns-55.org.
adversal.org. 5 NS ns-1227.awsdns-25.org.
adversal.org. 5 NS ns-801.awsdns-36.net.
adversal.org. 5 NS ns-1902.awsdns-45.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0