Apex domains cannot have CNAME records.
Question and response
Question
dig qnova.se. NS
Answer
qnova.se. 5 NS ns1.svenskadomaner.se.
qnova.se. 5 NS ns3.svenskadomaner.se.
qnova.se. 5 NS ns2.svenskadomaner.se.
Authority
The response has no authority records.
Additional
ns1.svenskadomaner.se. 5 A 193.234.30.7
ns2.svenskadomaner.se. 5 A 135.181.36.129
ns3.svenskadomaner.se. 5 A 49.12.104.254
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0