Apex domains cannot have CNAME records.
Question and response
Question
dig tvpost.ro. NS
Answer
tvpost.ro. 5 NS ns2.tvpost.ro.
tvpost.ro. 5 NS ns1.tvpost.ro.
Authority
The response has no authority records.
Additional
ns1.tvpost.ro. 5 A 188.214.31.2
ns2.tvpost.ro. 5 A 188.214.31.12
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0