Apex domains cannot have CNAME records.
Question and response
Question
dig hostico.ro. NS
Answer
hostico.ro. 4 NS ns2.hostico.ro.
hostico.ro. 4 NS ns3.hostico.ro.
hostico.ro. 4 NS ns4.hostico.ro.
hostico.ro. 4 NS ns1.hostico.ro.
Authority
The response has no authority records.
Additional
ns1.hostico.ro. 4 A 188.241.222.5
ns2.hostico.ro. 4 A 188.212.37.253
ns3.hostico.ro. 4 A 89.44.200.19
ns4.hostico.ro. 4 A 77.81.2.9
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0