Apex domains cannot have CNAME records.
Question and response
Question
dig cagdasaytemizlik.com. NS
Answer
cagdasaytemizlik.com. 5 NS ns1.cagdasaytemizlik.com.
cagdasaytemizlik.com. 5 NS ns2.cagdasaytemizlik.com.
Authority
The response has no authority records.
Additional
ns1.cagdasaytemizlik.com. 5 A 192.151.146.76
ns2.cagdasaytemizlik.com. 5 A 162.248.7.182
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0