Apex domains cannot have CNAME records.
Question and response
Question
dig plesk.scinet.uz. NS
Answer
plesk.scinet.uz. 2 NS hosting.scinet.uz.
plesk.scinet.uz. 2 NS ns01.uzsci.net.
Authority
The response has no authority records.
Additional
hosting.scinet.uz. 2 A 83.69.129.17
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0