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