Apex domains cannot have CNAME records.
Question and response
Question
dig kookoolkan.com. NS
Answer
kookoolkan.com. 4 NS ns200.anycast.me.
kookoolkan.com. 4 NS dns200.anycast.me.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0