Apex domains cannot have CNAME records.
Question and response
Question
dig supremeserver1.com. NS
Answer
supremeserver1.com. 1 NS dns1.supremeserver1.com.
supremeserver1.com. 1 NS dns2.supremeserver1.com.
Authority
The response has no authority records.
Additional
dns1.supremeserver1.com. 1 A 198.23.53.28
dns2.supremeserver1.com. 1 A 198.23.53.30
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0