Apex domains cannot have CNAME records.
Question and response
Question
dig cybergrants.com. NS
Answer
cybergrants.com. 5 NS ns-146.awsdns-18.com.
cybergrants.com. 5 NS ns-927.awsdns-51.net.
cybergrants.com. 5 NS ns-1152.awsdns-16.org.
cybergrants.com. 5 NS ns-1638.awsdns-12.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0