Apex domains cannot have CNAME records.
Question and response
Question
dig comandor.ro. NS
Answer
comandor.ro. 5 NS pluto.o2it.ro.
comandor.ro. 5 NS venus.o2it.ro.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0