Apex domains cannot have CNAME records.
Question and response
Question
dig ahost.uz. NS
Answer
ahost.uz. 5 NS dns2.ahost.uz.
ahost.uz. 5 NS dns1.ahost.uz.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0