Apex domains cannot have CNAME records.
Question and response
Question
dig ideha.org. NS
Answer
ideha.org. 5 NS ns-219.awsdns-27.com.
ideha.org. 5 NS ns-626.awsdns-14.net.
ideha.org. 5 NS ns-583.awsdns-08.net.
ideha.org. 5 NS ns-874.awsdns-45.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0