Apex domains cannot have CNAME records.
Question and response
Question
dig awsdns-01.net. NS
Answer
awsdns-01.net. 5 NS g-ns-1345.awsdns-01.net.
awsdns-01.net. 5 NS g-ns-771.awsdns-01.net.
awsdns-01.net. 5 NS g-ns-450.awsdns-01.net.
awsdns-01.net. 5 NS g-ns-1921.awsdns-01.net.
Authority
The response has no authority records.
Additional
g-ns-450.awsdns-01.net. 5 A 205.251.193.194
g-ns-771.awsdns-01.net. 5 A 205.251.195.3
g-ns-1345.awsdns-01.net. 5 A 205.251.197.65
g-ns-1921.awsdns-01.net. 5 A 205.251.199.129
g-ns-450.awsdns-01.net. 5 AAAA 2600:9000:5301:c200:0:0:0:1
g-ns-771.awsdns-01.net. 5 AAAA 2600:9000:5303:300:0:0:0:1
g-ns-1345.awsdns-01.net. 5 AAAA 2600:9000:5305:4100:0:0:0:1
g-ns-1921.awsdns-01.net. 5 AAAA 2600:9000:5307:8100:0:0:0:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0