mx2.vuurwerk.nl has no NS records.
NS records for this zone are defined at vuurwerk.nl.
NS records for this zone are defined at vuurwerk.nl.
Question and response
Question
dig mx2.vuurwerk.nl. NS
Answer
The response has no answer records.
Authority
vuurwerk.nl. 1800 SOA anahi.ns.cloudflare.com. dns.cloudflare.com. 2395265218 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0