Apex domains cannot have CNAME records.
Question and response
Question
dig medalelectronic.com. NS
Answer
medalelectronic.com. 5 NS ns1.medalelectronic.com.
medalelectronic.com. 5 NS ns2.medalelectronic.com.
Authority
The response has no authority records.
Additional
ns1.medalelectronic.com. 5 A 51.77.64.8
ns2.medalelectronic.com. 5 A 51.77.72.89
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0