ns2.coreit.se has no CNAME records.
Question and response
Question
dig ns2.coreit.se. NS
Answer
The response has no answer records.
Authority
coreit.se. 2174 SOA ns1.coreit.se. registry.coreit.se. 2014051753 21600 10800 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0