Apex domains cannot have CNAME records.
Question and response
Question
dig vemap.com. NS
Answer
vemap.com. 3 NS dns1.ontec.at.
vemap.com. 3 NS dns2.ontec.at.
Authority
The response has no authority records.
Additional
dns1.ontec.at. 3 A 37.252.250.215
dns2.ontec.at. 3 A 62.218.202.19
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0