Apex domains cannot have CNAME records.
Question and response
Question
dig tunerstraderonline.com. NS
Answer
tunerstraderonline.com. 5 NS ns-1544.awsdns-01.co.uk.
tunerstraderonline.com. 5 NS ns-303.awsdns-37.com.
tunerstraderonline.com. 5 NS ns-309.awsdns-38.com.
tunerstraderonline.com. 5 NS ns-738.awsdns-28.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0