Apex domains cannot have CNAME records.
Question and response
Question
dig HHOS.RU. NS
Answer
hhos.ru. 5 NS ns1.hhos.ru.
hhos.ru. 5 NS ns2.hhos.ru.
Authority
The response has no authority records.
Additional
ns1.HHOS.RU. 5 A 95.216.78.220
ns2.hhos.ru. 5 A 95.216.78.195
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0