Apex domains cannot have CNAME records.
Question and response
Question
dig awsdns-62.com. NS
Answer
awsdns-62.com. 5 NS g-ns-1790.awsdns-62.com.
awsdns-62.com. 5 NS g-ns-638.awsdns-62.com.
awsdns-62.com. 5 NS g-ns-63.awsdns-62.com.
awsdns-62.com. 5 NS g-ns-1214.awsdns-62.com.
Authority
The response has no authority records.
Additional
g-ns-63.awsdns-62.com. 5 A 205.251.192.63
g-ns-638.awsdns-62.com. 5 A 205.251.194.126
g-ns-1214.awsdns-62.com. 5 A 205.251.196.190
g-ns-1790.awsdns-62.com. 5 A 205.251.198.254
g-ns-63.awsdns-62.com. 5 AAAA 2600:9000:5300:3f00:0:0:0:1
g-ns-638.awsdns-62.com. 5 AAAA 2600:9000:5302:7e00:0:0:0:1
g-ns-1214.awsdns-62.com. 5 AAAA 2600:9000:5304:be00:0:0:0:1
g-ns-1790.awsdns-62.com. 5 AAAA 2600:9000:5306:fe00:0:0:0:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0