Apex domains cannot have CNAME records.
Question and response
Question
dig abaciogluinsaat.com. NS
Answer
abaciogluinsaat.com. 5 NS ns2.abaciogluinsaat.com.
abaciogluinsaat.com. 5 NS ns1.abaciogluinsaat.com.
Authority
The response has no authority records.
Additional
ns1.abaciogluinsaat.com. 5 A 208.115.210.178
ns2.abaciogluinsaat.com. 5 A 208.115.210.181
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0