Apex domains cannot have CNAME records.
Question and response
Question
dig hotmin.ro. NS
Answer
hotmin.ro. 5 NS ns1.s-net.ro.
hotmin.ro. 5 NS dns1.s-net.ro.
Authority
The response has no authority records.
Additional
ns1.s-net.ro. 5 A 77.81.97.9
dns1.s-net.ro. 5 A 85.120.92.2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0