Apex domains cannot have CNAME records.
Question and response
Question
dig vtv-preprod.vodafone.al. NS
Answer
vtv-preprod.vodafone.al. 5 NS ns1.vtv-preprod.vodafone.al.
Authority
The response has no authority records.
Additional
ns1.vtv-preprod.vodafone.al. 5 A 80.78.64.247
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0