mx0.rz-ip.net has no NS records.
NS records for this zone are defined at rz-ip.net.
NS records for this zone are defined at rz-ip.net.
Question and response
Question
dig mx0.rz-ip.net. NS
Answer
The response has no answer records.
Authority
rz-ip.net. 1800 SOA pns.rz-ip.net. hostmaster.rz-ip.net. 2025021203 10800 3600 3600000 1800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0