Apex domains cannot have CNAME records.
Question and response
Question
dig vtv-prod.vodafone.ro. NS
Answer
vtv-prod.vodafone.ro. 5 NS ns1.vtv-prod.vodafone.ro.
Authority
The response has no authority records.
Additional
ns1.vtv-prod.vodafone.ro. 5 A 136.255.254.132
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0