Apex domains cannot have CNAME records.
Question and response
Question
dig vds.24HC.RU. NS
Answer
vds.24hc.ru. 5 NS n1.24hc.ru.
vds.24hc.ru. 5 NS ns20.24hc.ru.
vds.24hc.ru. 5 NS ns10.24hc.ru.
vds.24hc.ru. 5 NS n2.24hc.ru.
Authority
The response has no authority records.
Additional
n1.24HC.RU. 5 A 195.208.47.8
n2.24HC.RU. 5 A 195.208.47.6
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0