mx201.it.ntnu.no has no NS records.
NS records for this zone are defined at it.ntnu.no.
NS records for this zone are defined at it.ntnu.no.
Question and response
Question
dig mx201.it.ntnu.no. NS
Answer
The response has no answer records.
Authority
it.ntnu.no. 3600 SOA dnsadmin.itea.ntnu.no. hostmaster.ntnu.no. 2026021903 28800 3600 2419200 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0