Apex domains cannot have CNAME records.
Question and response
Question
dig netcore.co.in. NS
Answer
netcore.co.in. 5 NS ns-831.awsdns-39.net.
netcore.co.in. 5 NS ns-1930.awsdns-49.co.uk.
netcore.co.in. 5 NS ns-428.awsdns-53.com.
netcore.co.in. 5 NS ns-1224.awsdns-25.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0