Apex domains cannot have CNAME records.
Question and response
Question
dig avtlg.ru. NS
Answer
avtlg.ru. 5 NS adns1.south.rt.ru.
avtlg.ru. 5 NS adns2.south.rt.ru.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0