Apex domains cannot have CNAME records.
Question and response
Question
dig BEGET.RU. NS
Answer
BEGET.RU. 5 NS ns1.BEGET.RU.
BEGET.RU. 5 NS ns2.beget.com.
BEGET.RU. 5 NS ns1.beget.pro.
BEGET.RU. 5 NS ns2.BEGET.RU.
BEGET.RU. 5 NS ns1.beget.com.
BEGET.RU. 5 NS ns2.beget.pro.
Authority
The response has no authority records.
Additional
ns1.BEGET.RU. 5 A 5.101.159.11
ns2.BEGET.RU. 5 A 185.50.27.12
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0