Apex domains cannot have CNAME records.
Question and response
Question
dig artigermansh.com. NS
Answer
artigermansh.com. 5 NS ns-1973.awsdns-54.co.uk.
artigermansh.com. 5 NS ns-897.awsdns-48.net.
artigermansh.com. 5 NS ns-109.awsdns-13.com.
artigermansh.com. 5 NS ns-1085.awsdns-07.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0