mx02.monsternett.no has no CNAME records.
Question and response
Question
dig mx02.monsternett.no. NS
Answer
The response has no answer records.
Authority
monsternett.no. 3600 SOA ns1.monsternett.no. hostmaster.monsternett.no. 2026030401 14400 1800 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0