Apex domains cannot have CNAME records.
Question and response
Question
dig gin.ru. NS
Answer
gin.ru. 5 NS master.rosprint.net.
gin.ru. 5 NS ns2.rosprint.net.
gin.ru. 5 NS ns1.rosprint.net.
Authority
The response has no authority records.
Additional
ns1.rosprint.net. 5 A 185.128.196.254
ns2.rosprint.net. 5 A 194.84.23.125
master.rosprint.net. 5 A 195.151.241.2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0