Apex domains cannot have CNAME records.
Question and response
Question
dig me-central-1.compute.amazonaws.com. NS
Answer
me-central-1.compute.amazonaws.com. 5 NS ns-992.awsdns-60.net.
me-central-1.compute.amazonaws.com. 5 NS ns-1847.awsdns-38.co.uk.
me-central-1.compute.amazonaws.com. 5 NS ns-195.awsdns-24.com.
me-central-1.compute.amazonaws.com. 5 NS ns-1213.awsdns-23.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0