Apex domains cannot have CNAME records.
Question and response
Question
dig s3-console-1.amazonaws.com. NS
Answer
s3-console-1.amazonaws.com. 5 NS ns-1405.awsdns-47.org.
s3-console-1.amazonaws.com. 5 NS ns-816.awsdns-38.net.
s3-console-1.amazonaws.com. 5 NS ns-491.awsdns-61.com.
s3-console-1.amazonaws.com. 5 NS ns-1649.awsdns-14.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0