nat4-vl10-lb7.core.noris.net has no NS records.
NS records for this zone are defined at core.noris.net.
NS records for this zone are defined at core.noris.net.
Question and response
Question
dig nat4-vl10-lb7.core.noris.net. NS
Answer
The response has no answer records.
Authority
core.noris.net. 600 SOA dns0.noris.net. hostmaster.noris.net.core.noris.net. 4289 86400 86400 2419200 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0