Apex domains cannot have CNAME records.
Question and response
Question
dig awsdns-41.org. NS
Answer
awsdns-41.org. 5 NS g-ns-747.awsdns-41.org.
awsdns-41.org. 5 NS g-ns-169.awsdns-41.org.
awsdns-41.org. 5 NS g-ns-1641.awsdns-41.org.
awsdns-41.org. 5 NS g-ns-1068.awsdns-41.org.
Authority
The response has no authority records.
Additional
g-ns-169.awsdns-41.org. 5 A 205.251.192.169
g-ns-747.awsdns-41.org. 5 A 205.251.194.235
g-ns-1068.awsdns-41.org. 5 A 205.251.196.44
g-ns-1641.awsdns-41.org. 5 A 205.251.198.105
g-ns-169.awsdns-41.org. 5 AAAA 2600:9000:5300:a900:0:0:0:1
g-ns-747.awsdns-41.org. 5 AAAA 2600:9000:5302:eb00:0:0:0:1
g-ns-1068.awsdns-41.org. 5 AAAA 2600:9000:5304:2c00:0:0:0:1
g-ns-1641.awsdns-41.org. 5 AAAA 2600:9000:5306:6900:0:0:0:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0