Apex domains cannot have CNAME records.
Question and response
Question
dig arthit284sh.com. NS
Answer
arthit284sh.com. 4 NS ns-1479.awsdns-56.org.
arthit284sh.com. 4 NS ns-1552.awsdns-02.co.uk.
arthit284sh.com. 4 NS ns-1030.awsdns-00.org.
arthit284sh.com. 4 NS ns-1042.awsdns-02.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0