Apex domains cannot have CNAME records.
Question and response
Question
dig ptr.wlsrv.com. NS
Answer
ptr.wlsrv.com. 4 NS ns1.hosting.com.tr.
ptr.wlsrv.com. 4 NS ns2.hosting.com.tr.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0