Apex domains cannot have CNAME records.
Question and response
Question
dig awsdns-34.org. NS
Answer
awsdns-34.org. 5 NS g-ns-1634.awsdns-34.org.
awsdns-34.org. 5 NS g-ns-162.awsdns-34.org.
awsdns-34.org. 5 NS g-ns-740.awsdns-34.org.
awsdns-34.org. 5 NS g-ns-1061.awsdns-34.org.
Authority
The response has no authority records.
Additional
g-ns-162.awsdns-34.org. 5 A 205.251.192.162
g-ns-740.awsdns-34.org. 5 A 205.251.194.228
g-ns-1061.awsdns-34.org. 5 A 205.251.196.37
g-ns-1634.awsdns-34.org. 5 A 205.251.198.98
g-ns-162.awsdns-34.org. 5 AAAA 2600:9000:5300:a200:0:0:0:1
g-ns-740.awsdns-34.org. 5 AAAA 2600:9000:5302:e400:0:0:0:1
g-ns-1061.awsdns-34.org. 5 AAAA 2600:9000:5304:2500:0:0:0:1
g-ns-1634.awsdns-34.org. 5 AAAA 2600:9000:5306:6200:0:0:0:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0