Apex domains cannot have CNAME records.
Question and response
Question
dig itcex.se. NS
Answer
itcex.se. 5 NS dns4.itconnection.se.
itcex.se. 5 NS dns3.itconnection.se.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0