net.sigma.se CNAME records

CNAME Canonical name
Apex domains cannot have CNAME records.

Question and response

Question

dig net.sigma.se. NS

Answer

net.sigma.se. 5 NS ns02.mgmt.rts.se. net.sigma.se. 5 NS ns01.mgmt.rts.se.

Authority

The response has no authority records.

Additional

ns01.mgmt.rts.se. 5 A 81.92.65.144 ns02.mgmt.rts.se. 5 A 80.87.49.156 . 0 OPT ; payload 1232, xrcode 0, version 0, flags 0