Apex domains cannot have CNAME records.
Question and response
Question
dig ozguncevre.com. NS
Answer
ozguncevre.com. 5 NS ns-1402.awsdns-47.org.
ozguncevre.com. 5 NS ns-1847.awsdns-38.co.uk.
ozguncevre.com. 5 NS ns-548.awsdns-04.net.
ozguncevre.com. 5 NS ns-1064.awsdns-05.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0