Apex domains cannot have CNAME records.
Question and response
Question
dig cp247.net. NS
Answer
cp247.net. 4 NS b.ns.ns247.net.
cp247.net. 4 NS a.ns.ns247.net.
cp247.net. 4 NS d.ns.ns247.net.
cp247.net. 4 NS c.ns.ns247.net.
Authority
The response has no authority records.
Additional
a.ns.ns247.net. 4 A 89.238.129.66
b.ns.ns247.net. 4 A 89.238.133.66
c.ns.ns247.net. 4 A 23.92.16.125
d.ns.ns247.net. 4 A 172.104.95.77
a.ns.ns247.net. 4 AAAA 2a02:40:23:0:0:0:1:a
b.ns.ns247.net. 4 AAAA 2a02:40:23:0:0:0:1:b
c.ns.ns247.net. 4 AAAA 2600:3c03:0:0:f03c:91ff:fedb:d91b
d.ns.ns247.net. 4 AAAA 2400:8902:0:0:f03c:91ff:fed6:35f2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0