Apex domains cannot have CNAME records.
Question and response
Question
dig iraq-sezer.com. NS
Answer
iraq-sezer.com. 5 NS ns-830.awsdns-39.net.
iraq-sezer.com. 5 NS ns-690.awsdns-22.net.
iraq-sezer.com. 5 NS ns-10.awsdns-01.com.
iraq-sezer.com. 5 NS ns-433.awsdns-54.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0