Apex domains cannot have CNAME records.
Question and response
Question
dig equant.ru. NS
Answer
equant.ru. 4 NS master.rosprint.net.
equant.ru. 4 NS ns1.rosprint.net.
equant.ru. 4 NS ns2.rosprint.net.
Authority
The response has no authority records.
Additional
ns1.rosprint.net. 4 A 185.128.196.254
ns2.rosprint.net. 4 A 194.84.23.125
master.rosprint.net. 4 A 195.151.241.2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0