Apex domains cannot have CNAME records.
Question and response
Question
dig supremebox.com. NS
Answer
supremebox.com. 4 NS dns1.supremebox.com.
supremebox.com. 4 NS dns2.supremebox.com.
Authority
The response has no authority records.
Additional
dns1.supremebox.com. 4 A 198.23.53.28
dns2.supremebox.com. 4 A 198.23.53.30
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0