Apex domains cannot have CNAME records.
Question and response
Question
dig awsdns-26.net. NS
Answer
awsdns-26.net. 5 NS g-ns-1946.awsdns-26.net.
awsdns-26.net. 5 NS g-ns-796.awsdns-26.net.
awsdns-26.net. 5 NS g-ns-475.awsdns-26.net.
awsdns-26.net. 5 NS g-ns-1370.awsdns-26.net.
Authority
The response has no authority records.
Additional
g-ns-475.awsdns-26.net. 5 A 205.251.193.219
g-ns-796.awsdns-26.net. 5 A 205.251.195.28
g-ns-1370.awsdns-26.net. 5 A 205.251.197.90
g-ns-1946.awsdns-26.net. 5 A 205.251.199.154
g-ns-475.awsdns-26.net. 5 AAAA 2600:9000:5301:db00:0:0:0:1
g-ns-796.awsdns-26.net. 5 AAAA 2600:9000:5303:1c00:0:0:0:1
g-ns-1370.awsdns-26.net. 5 AAAA 2600:9000:5305:5a00:0:0:0:1
g-ns-1946.awsdns-26.net. 5 AAAA 2600:9000:5307:9a00:0:0:0:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0