Apex domains cannot have CNAME records.
Question and response
Question
dig awsdns-41.com. NS
Answer
awsdns-41.com. 5 NS g-ns-617.awsdns-41.com.
awsdns-41.com. 5 NS g-ns-42.awsdns-41.com.
awsdns-41.com. 5 NS g-ns-1769.awsdns-41.com.
awsdns-41.com. 5 NS g-ns-1193.awsdns-41.com.
Authority
The response has no authority records.
Additional
g-ns-42.awsdns-41.com. 5 A 205.251.192.42
g-ns-617.awsdns-41.com. 5 A 205.251.194.105
g-ns-1193.awsdns-41.com. 5 A 205.251.196.169
g-ns-1769.awsdns-41.com. 5 A 205.251.198.233
g-ns-42.awsdns-41.com. 5 AAAA 2600:9000:5300:2a00:0:0:0:1
g-ns-617.awsdns-41.com. 5 AAAA 2600:9000:5302:6900:0:0:0:1
g-ns-1193.awsdns-41.com. 5 AAAA 2600:9000:5304:a900:0:0:0:1
g-ns-1769.awsdns-41.com. 5 AAAA 2600:9000:5306:e900:0:0:0:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0