Apex domains cannot have CNAME records.
Question and response
Question
dig aalausd.org. NS
Answer
aalausd.org. 5 NS ns-596.awsdns-10.net.
aalausd.org. 5 NS ns-1361.awsdns-42.org.
aalausd.org. 5 NS ns-1206.awsdns-22.org.
aalausd.org. 5 NS ns-1887.awsdns-43.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0