Apex domains cannot have CNAME records.
Question and response
Question
dig mitrakons.com. NS
Answer
mitrakons.com. 3 NS ns-1830.awsdns-36.co.uk.
mitrakons.com. 3 NS ns-149.awsdns-18.com.
mitrakons.com. 3 NS ns-1218.awsdns-24.org.
mitrakons.com. 3 NS ns-1861.awsdns-40.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0