Apex domains cannot have CNAME records.
Question and response
Question
dig mcntt.ru. NS
Answer
mcntt.ru. 4 NS ns1.ntt.ru.
mcntt.ru. 4 NS ns.mcntt.ru.
Authority
The response has no authority records.
Additional
ns.mcntt.RU. 4 A 195.28.32.3
ns1.ntt.RU. 5 A 195.28.33.1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0