Apex domains cannot have CNAME records.
Question and response
Question
dig nw004.com. NS
Answer
nw004.com. 5 NS ns-237.awsdns-29.com.
nw004.com. 5 NS ns-1245.awsdns-27.org.
nw004.com. 5 NS ns-778.awsdns-33.net.
nw004.com. 5 NS ns-1705.awsdns-21.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0