Apex domains cannot have CNAME records.
Question and response
Question
dig domaiiin.com. NS
Answer
domaiiin.com. 5 NS ns-1244.awsdns-27.org.
domaiiin.com. 5 NS ns-1774.awsdns-29.co.uk.
domaiiin.com. 5 NS ns-487.awsdns-60.com.
domaiiin.com. 5 NS ns-1123.awsdns-12.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0