Apex domains cannot have CNAME records.
Question and response
Question
dig eastal.com. NS
Answer
eastal.com. 5 NS ns-1018.awsdns-63.net.
eastal.com. 5 NS ns-1059.awsdns-04.org.
eastal.com. 5 NS ns-1751.awsdns-26.co.uk.
eastal.com. 5 NS ns-261.awsdns-32.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0