Apex domains cannot have CNAME records.
Question and response
Question
dig moscomnet.ru. NS
Answer
moscomnet.ru. 5 NS ns1.moscomnet.ru.
moscomnet.ru. 5 NS ns2.moscomnet.ru.
Authority
The response has no authority records.
Additional
ns1.moscomnet.ru. 5 A 185.221.164.250
ns2.moscomnet.ru. 5 A 185.221.165.250
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0