Apex domains cannot have CNAME records.
Question and response
Question
dig nw000.com. NS
Answer
nw000.com. 5 NS ns-1814.awsdns-34.co.uk.
nw000.com. 5 NS ns-1403.awsdns-47.org.
nw000.com. 5 NS ns-284.awsdns-35.com.
nw000.com. 5 NS ns-680.awsdns-21.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0