Apex domains cannot have CNAME records.
Question and response
Question
dig eight-oh-eight.org. NS
Answer
eight-oh-eight.org. 5 NS ns-1902.awsdns-45.co.uk.
eight-oh-eight.org. 5 NS ns-929.awsdns-52.net.
eight-oh-eight.org. 5 NS ns-185.awsdns-23.com.
eight-oh-eight.org. 5 NS ns-464.awsdns-58.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0