Apex domains cannot have CNAME records.
Question and response
Question
dig awsdns-24.net. NS
Answer
awsdns-24.net. 5 NS g-ns-473.awsdns-24.net.
awsdns-24.net. 5 NS g-ns-1944.awsdns-24.net.
awsdns-24.net. 5 NS g-ns-1368.awsdns-24.net.
awsdns-24.net. 5 NS g-ns-794.awsdns-24.net.
Authority
The response has no authority records.
Additional
g-ns-473.awsdns-24.net. 5 A 205.251.193.217
g-ns-794.awsdns-24.net. 5 A 205.251.195.26
g-ns-1368.awsdns-24.net. 5 A 205.251.197.88
g-ns-1944.awsdns-24.net. 5 A 205.251.199.152
g-ns-473.awsdns-24.net. 5 AAAA 2600:9000:5301:d900:0:0:0:1
g-ns-794.awsdns-24.net. 5 AAAA 2600:9000:5303:1a00:0:0:0:1
g-ns-1368.awsdns-24.net. 5 AAAA 2600:9000:5305:5800:0:0:0:1
g-ns-1944.awsdns-24.net. 5 AAAA 2600:9000:5307:9800:0:0:0:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0