smtp.nextgenerationnetworks.nl has no NS records.
NS records for this zone are defined at nextgenerationnetworks.nl.
NS records for this zone are defined at nextgenerationnetworks.nl.
Question and response
Question
dig smtp.nextgenerationnetworks.nl. NS
Answer
The response has no answer records.
Authority
nextgenerationnetworks.nl. 300 SOA ns0.transip.net. hostmaster.transip.nl. 2022040600 86400 1800 2419200 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0