Apex domains cannot have CNAME records.
Question and response
Question
dig dkgvc.com. NS
Answer
dkgvc.com. 5 NS ns-690.awsdns-22.net.
dkgvc.com. 5 NS ns-434.awsdns-54.com.
dkgvc.com. 5 NS ns-1718.awsdns-22.co.uk.
dkgvc.com. 5 NS ns-1149.awsdns-15.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0