Apex domains cannot have CNAME records.
Question and response
Question
dig amaonline.com. NS
Answer
amaonline.com. 4 NS shiner.amaonline.com.
amaonline.com. 4 NS ns1.amaonline.com.
Authority
The response has no authority records.
Additional
ns1.amaonline.com. 4 A 69.6.190.8
shiner.amaonline.com. 4 A 69.6.190.9
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0