Apex domains cannot have CNAME records.
Question and response
Question
dig ilkurc.com. NS
Answer
ilkurc.com. 2 NS ns-259.awsdns-32.com.
ilkurc.com. 2 NS ns-284.awsdns-35.com.
ilkurc.com. 2 NS ns-1487.awsdns-57.org.
ilkurc.com. 2 NS ns-254.awsdns-31.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0