Apex domains cannot have CNAME records.
Question and response
Question
dig vitelcom.net. NS
Answer
vitelcom.net. 4 NS ns2.vipowernet.net.
vitelcom.net. 4 NS ns1.vipowernet.net.
Authority
The response has no authority records.
Additional
ns1.vipowernet.net. 4 A 209.221.192.66
ns2.vipowernet.net. 4 A 66.248.160.66
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0