Apex domains cannot have CNAME records.
Question and response
Question
dig cw.net. NS
Answer
cw.net. 5 NS ans1.cw.net.
cw.net. 5 NS ans2.cw.net.
Authority
The response has no authority records.
Additional
ans1.cw.net. 5 A 141.1.27.248
ans2.cw.net. 5 A 195.27.1.2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0