Apex domains cannot have CNAME records.
Question and response
Question
dig ROSONE.RU. NS
Answer
ROSONE.RU. 5 NS ridge.ns.cloudflare.com.
ROSONE.RU. 5 NS treasure.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0