Apex domains cannot have CNAME records.
Question and response
Question
dig gtsgroup.ro. NS
Answer
gtsgroup.ro. 5 NS ns.kpnqwest.ro.
gtsgroup.ro. 5 NS ns1.gtsgroup.ro.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0