Apex domains cannot have CNAME records.
Question and response
Question
dig artgerlsh.com. NS
Answer
artgerlsh.com. 5 NS ns-1219.awsdns-24.org.
artgerlsh.com. 5 NS ns-1577.awsdns-05.co.uk.
artgerlsh.com. 5 NS ns-16.awsdns-02.com.
artgerlsh.com. 5 NS ns-1477.awsdns-56.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0