ns2.asok.de has no NS records.
NS records for this zone are defined at asok.de.
NS records for this zone are defined at asok.de.
Question and response
Question
dig ns2.asok.de. NS
Answer
The response has no answer records.
Authority
asok.de. 3600 SOA ns1.asok.de. hostmaster.asok.de. 8 86400 10800 3600000 172800
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0