Apex domains cannot have CNAME records.
Question and response
Question
dig artjombogdanov1sh.com. NS
Answer
artjombogdanov1sh.com. 4 NS ns-1085.awsdns-07.org.
artjombogdanov1sh.com. 4 NS ns-1557.awsdns-02.co.uk.
artjombogdanov1sh.com. 4 NS ns-351.awsdns-43.com.
artjombogdanov1sh.com. 4 NS ns-676.awsdns-20.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0