Apex domains cannot have CNAME records.
Question and response
Question
dig SMARTAPE.RU. NS
Answer
smartape.ru. 2 NS ns4.SMARTAPE.RU.
smartape.ru. 2 NS ns3.SMARTAPE.RU.
Authority
The response has no authority records.
Additional
ns3.smartape.ru. 2 A 188.127.239.203
ns4.smartape.ru. 2 A 188.127.239.204
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0