Apex domains cannot have CNAME records.
Question and response
Question
dig n0x.net. NS
Answer
n0x.net. 5 NS impala.n0x.net.
Authority
The response has no authority records.
Additional
impala.n0x.net. 5 A 97.107.134.57
impala.n0x.net. 5 AAAA 2600:3c03:0:0:f03c:94ff:fefc:d33a
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0