Apex domains cannot have CNAME records.
Question and response
Question
dig radwarecloud.net. NS
Answer
radwarecloud.net. 3 NS ns-cloud-c4.googledomains.com.
radwarecloud.net. 3 NS ns-534.awsdns-02.net.
radwarecloud.net. 3 NS ns-cloud-c2.googledomains.com.
radwarecloud.net. 3 NS ns-cloud-c1.googledomains.com.
radwarecloud.net. 3 NS ns-199.awsdns-24.com.
radwarecloud.net. 3 NS ns-1029.awsdns-00.org.
radwarecloud.net. 3 NS ns-1715.awsdns-22.co.uk.
radwarecloud.net. 3 NS ns-cloud-c3.googledomains.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0