Apex domains cannot have CNAME records.
Question and response
Question
dig awsdns-62.org. NS
Answer
awsdns-62.org. 5 NS g-ns-1662.awsdns-62.org.
awsdns-62.org. 5 NS g-ns-190.awsdns-62.org.
awsdns-62.org. 5 NS g-ns-961.awsdns-62.org.
awsdns-62.org. 5 NS g-ns-1282.awsdns-62.org.
Authority
The response has no authority records.
Additional
g-ns-190.awsdns-62.org. 5 A 205.251.192.190
g-ns-961.awsdns-62.org. 5 A 205.251.195.193
g-ns-1282.awsdns-62.org. 5 A 205.251.197.2
g-ns-1662.awsdns-62.org. 5 A 205.251.198.126
g-ns-190.awsdns-62.org. 5 AAAA 2600:9000:5300:be00:0:0:0:1
g-ns-961.awsdns-62.org. 5 AAAA 2600:9000:5303:c100:0:0:0:1
g-ns-1282.awsdns-62.org. 5 AAAA 2600:9000:5305:200:0:0:0:1
g-ns-1662.awsdns-62.org. 5 AAAA 2600:9000:5306:7e00:0:0:0:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0