Apex domains cannot have CNAME records.
Question and response
Question
dig all4y.net. NS
Answer
all4y.net. 5 NS ns1.all4y.net.
all4y.net. 5 NS ns2.all4y.net.
Authority
The response has no authority records.
Additional
ns1.all4y.net. 5 A 94.190.185.1
ns2.all4y.net. 5 A 94.190.185.2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0