Apex domains cannot have CNAME records.
Question and response
Question
dig rusonyx.ru. NS
Answer
rusonyx.ru. 4 NS sns2.rsnx.ru.
rusonyx.ru. 4 NS sns1.rsnx.ru.
Authority
The response has no authority records.
Additional
sns1.rsnx.ru. 4 A 89.253.252.11
sns2.rsnx.ru. 4 A 195.2.69.96
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0