firm.eskimoskrefeld.com has no NS records.
NS records for this zone are defined at eskimoskrefeld.com.
NS records for this zone are defined at eskimoskrefeld.com.
Question and response
Question
dig firm.eskimoskrefeld.com. NS
Answer
The response has no answer records.
Authority
eskimoskrefeld.com. 3601 SOA dns1.registrar-servers.com. hostmaster.registrar-servers.com. 1771842296 43200 3600 604800 3601
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0