Apex domains cannot have CNAME records.
Question and response
Question
dig neotel.at. NS
Answer
neotel.at. 5 NS dns1.neotel.at.
neotel.at. 5 NS dns2.neotel.at.
Authority
The response has no authority records.
Additional
dns1.neotel.at. 5 A 91.237.65.122
dns2.neotel.at. 5 A 193.84.65.250
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0