Apex domains cannot have CNAME records.
Question and response
Question
dig bitsdata.se. NS
Answer
bitsdata.se. 5 NS kristina.qbranch.se.
bitsdata.se. 5 NS grace.qbranch.se.
bitsdata.se. 5 NS maud.qbranch.se.
Authority
The response has no authority records.
Additional
maud.qbranch.se. 5 A 217.151.192.121
grace.qbranch.se. 5 A 217.151.192.20
kristina.qbranch.se. 5 A 5.79.6.249
maud.qbranch.se. 5 AAAA 2a03:c300:1:1:0:0:0:20
grace.qbranch.se. 5 AAAA 2a03:c300:1:1:0:0:0:21
kristina.qbranch.se. 5 AAAA 2a00:1a48:7803:107:4748:d7de:ff08:8f1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0