mx.hanniemommers.nl has no NS records.
NS records for this zone are defined at hanniemommers.nl.
NS records for this zone are defined at hanniemommers.nl.
Question and response
Question
dig mx.hanniemommers.nl. NS
Answer
The response has no answer records.
Authority
hanniemommers.nl. 3601 SOA dns1.registrar-servers.com. hostmaster.registrar-servers.com. 1773753220 43200 3600 604800 3601
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0