Apex domains cannot have CNAME records.
Question and response
Question
dig awsdns-02.org. NS
Answer
awsdns-02.org. 5 NS g-ns-1602.awsdns-02.org.
awsdns-02.org. 5 NS g-ns-130.awsdns-02.org.
awsdns-02.org. 5 NS g-ns-708.awsdns-02.org.
awsdns-02.org. 5 NS g-ns-1029.awsdns-02.org.
Authority
The response has no authority records.
Additional
g-ns-130.awsdns-02.org. 5 A 205.251.192.130
g-ns-708.awsdns-02.org. 5 A 205.251.194.196
g-ns-1029.awsdns-02.org. 5 A 205.251.196.5
g-ns-1602.awsdns-02.org. 5 A 205.251.198.66
g-ns-130.awsdns-02.org. 5 AAAA 2600:9000:5300:8200:0:0:0:1
g-ns-708.awsdns-02.org. 5 AAAA 2600:9000:5302:c400:0:0:0:1
g-ns-1029.awsdns-02.org. 5 AAAA 2600:9000:5304:500:0:0:0:1
g-ns-1602.awsdns-02.org. 5 AAAA 2600:9000:5306:4200:0:0:0:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0