Apex domains cannot have CNAME records.
Question and response
Question
dig hostico.net. NS
Answer
hostico.net. 5 NS ns1.hostico.net.
hostico.net. 5 NS ns2.hostico.net.
hostico.net. 5 NS ns3.hostico.net.
hostico.net. 5 NS ns4.hostico.net.
Authority
The response has no authority records.
Additional
ns1.hostico.net. 5 A 188.241.222.5
ns2.hostico.net. 5 A 188.212.37.253
ns3.hostico.net. 5 A 89.44.200.19
ns4.hostico.net. 5 A 77.81.2.9
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0