Apex domains cannot have CNAME records.
Question and response
Question
dig awsdns-02.net. NS
Answer
awsdns-02.net. 5 NS g-ns-1346.awsdns-02.net.
awsdns-02.net. 5 NS g-ns-772.awsdns-02.net.
awsdns-02.net. 5 NS g-ns-451.awsdns-02.net.
awsdns-02.net. 5 NS g-ns-1922.awsdns-02.net.
Authority
The response has no authority records.
Additional
g-ns-451.awsdns-02.net. 5 A 205.251.193.195
g-ns-772.awsdns-02.net. 5 A 205.251.195.4
g-ns-1346.awsdns-02.net. 5 A 205.251.197.66
g-ns-1922.awsdns-02.net. 5 A 205.251.199.130
g-ns-451.awsdns-02.net. 5 AAAA 2600:9000:5301:c300:0:0:0:1
g-ns-772.awsdns-02.net. 5 AAAA 2600:9000:5303:400:0:0:0:1
g-ns-1346.awsdns-02.net. 5 AAAA 2600:9000:5305:4200:0:0:0:1
g-ns-1922.awsdns-02.net. 5 AAAA 2600:9000:5307:8200:0:0:0:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0