Apex domains cannot have CNAME records.
Question and response
Question
dig estaats.com. NS
Answer
estaats.com. 5 NS ns-516.awsdns-00.net.
estaats.com. 5 NS ns-850.awsdns-42.net.
estaats.com. 5 NS ns-1941.awsdns-50.co.uk.
estaats.com. 5 NS ns-376.awsdns-47.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0