Apex domains cannot have CNAME records.
Question and response
Question
dig awsdns-07.com. NS
Answer
awsdns-07.com. 5 NS g-ns-583.awsdns-07.com.
awsdns-07.com. 5 NS g-ns-1159.awsdns-07.com.
awsdns-07.com. 5 NS g-ns-1735.awsdns-07.com.
awsdns-07.com. 5 NS g-ns-8.awsdns-07.com.
Authority
The response has no authority records.
Additional
g-ns-8.awsdns-07.com. 5 A 205.251.192.8
g-ns-583.awsdns-07.com. 5 A 205.251.194.71
g-ns-1159.awsdns-07.com. 5 A 205.251.196.135
g-ns-1735.awsdns-07.com. 5 A 205.251.198.199
g-ns-8.awsdns-07.com. 5 AAAA 2600:9000:5300:800:0:0:0:1
g-ns-583.awsdns-07.com. 5 AAAA 2600:9000:5302:4700:0:0:0:1
g-ns-1159.awsdns-07.com. 5 AAAA 2600:9000:5304:8700:0:0:0:1
g-ns-1735.awsdns-07.com. 5 AAAA 2600:9000:5306:c700:0:0:0:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0