Apex domains cannot have CNAME records.
Question and response
Question
dig TS35.RU. NS
Answer
ts35.ru. 5 NS ns2.ts35.ru.
ts35.ru. 5 NS ns1.ts35.ru.
Authority
The response has no authority records.
Additional
ns1.ts35.ru. 5 A 176.107.219.41
ns2.ts35.ru. 5 A 176.107.219.42
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0