Apex domains cannot have CNAME records.
Question and response
Question
dig mega.kg. NS
Answer
mega.kg. 5 NS 77.235.14.2.
mega.kg. 5 NS 77.235.14.3.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0