Apex domains cannot have CNAME records.
Question and response
Question
dig 96.11.204.in-addr.arpa. NS
Answer
96.11.204.in-addr.arpa. 5 NS ns2.innoscale.net.
96.11.204.in-addr.arpa. 5 NS ns1.innoscale.net.
Authority
The response has no authority records.
Additional
ns1.innoscale.net. 5 A 204.11.96.10
ns2.innoscale.net. 5 A 204.11.102.254
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0