_netblocks.itsjefen.no has no CNAME records.
Question and response
Question
dig _netblocks.itsjefen.no. NS
Answer
The response has no answer records.
Authority
itsjefen.no. 40669 SOA ns3.itsjefen.no. drift.itsjefen.no. 2026022601 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0