vmi521209.contaboserver.net has no NS records.
NS records for this zone are defined at contaboserver.net.
NS records for this zone are defined at contaboserver.net.
Question and response
Question
dig vmi521209.contaboserver.net. NS
Answer
The response has no answer records.
Authority
contaboserver.net. 3600 SOA ns1.contabo.net. hostmaster.contabo.de. 1773895014 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0