schiller.viramport.com has no NS records.
NS records for this zone are defined at viramport.com.
NS records for this zone are defined at viramport.com.
Question and response
Question
dig schiller.viramport.com. NS
Answer
The response has no answer records.
Authority
viramport.com. 3601 SOA dns1.registrar-servers.com. hostmaster.registrar-servers.com. 1773790822 43200 3600 604800 3601
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0