Apex domains cannot have CNAME records.
Question and response
Question
dig orionvm.com. NS
Answer
orionvm.com. 2 NS dns44.cloudns.net.
orionvm.com. 2 NS dns41.cloudns.net.
orionvm.com. 2 NS dns42.cloudns.net.
orionvm.com. 2 NS dns43.cloudns.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0