Apex domains cannot have CNAME records.
Question and response
Question
dig madgeniuses.net. NS
Answer
madgeniuses.net. 5 NS ns-81.awsdns-10.com.
madgeniuses.net. 5 NS ns-914.awsdns-50.net.
madgeniuses.net. 5 NS ns-1227.awsdns-25.org.
madgeniuses.net. 5 NS ns-1667.awsdns-16.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0