nw-vl1102.network.cyso.net has no NS records.
NS records for this zone are defined at network.cyso.net.
NS records for this zone are defined at network.cyso.net.
Question and response
Question
dig nw-vl1102.network.cyso.net. NS
Answer
The response has no answer records.
Authority
network.cyso.net. 300 SOA ns1.cyso.nl. dnsadmin.cysonet.com. 1773878400 16384 2048 1048576 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0