Apex domains cannot have CNAME records.
Question and response
Question
dig remote.management. NS
Answer
remote.management. 5 NS ns-1231.awsdns-25.org.
remote.management. 5 NS ns-1909.awsdns-46.co.uk.
remote.management. 5 NS ns-246.awsdns-30.com.
remote.management. 5 NS ns-985.awsdns-59.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0