Apex domains cannot have CNAME records.
Question and response
Question
dig artlebedev.com. NS
Answer
artlebedev.com. 5 NS ns1.design.ru.
artlebedev.com. 5 NS ns2.design.ru.
Authority
The response has no authority records.
Additional
ns1.design.ru. 5 A 195.218.200.243
ns2.design.ru. 5 A 62.213.108.180
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0