Apex domains cannot have CNAME records.
Question and response
Question
dig zagateveda.com. NS
Answer
zagateveda.com. 5 NS ns-1646.awsdns-13.co.uk.
zagateveda.com. 5 NS ns-1258.awsdns-29.org.
zagateveda.com. 5 NS ns-523.awsdns-01.net.
zagateveda.com. 5 NS ns-899.awsdns-48.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0