Apex domains cannot have CNAME records.
Question and response
Question
dig cwie.net. NS
Answer
cwie.net. 5 NS ns3.phoenixnap.com.
cwie.net. 5 NS ns1.phoenixnap.com.
cwie.net. 5 NS ns2.phoenixnap.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0