Apex domains cannot have CNAME records.
Question and response
Question
dig arcamax.com. NS
Answer
arcamax.com. 5 NS ns-524.awsdns-01.net.
arcamax.com. 5 NS ns-151.awsdns-18.com.
arcamax.com. 5 NS ns-1963.awsdns-53.co.uk.
arcamax.com. 5 NS ns-1333.awsdns-38.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0