Apex domains cannot have CNAME records.
Question and response
Question
dig datamagic.at. NS
Answer
datamagic.at. 5 NS ns2.datamagic.at.
datamagic.at. 5 NS ns1.datamagic.at.
datamagic.at. 5 NS ns4.datamagic.at.
datamagic.at. 5 NS ns3.datamagic.at.
Authority
The response has no authority records.
Additional
ns1.datamagic.at. 5 A 45.90.24.24
ns2.datamagic.at. 5 A 45.90.24.54
ns3.datamagic.at. 5 A 83.64.68.52
ns4.datamagic.at. 5 A 5.75.230.121
ns1.datamagic.at. 5 AAAA 2a06:3cc0:0:0:0:0:0:24
ns2.datamagic.at. 5 AAAA 2a06:3cc0:0:0:0:0:0:54
ns3.datamagic.at. 5 AAAA 2a01:5740:1000:3300:0:0:0:52
ns4.datamagic.at. 5 AAAA 2a01:4f8:c012:abdb:0:0:0:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0