hr.joboo.de has no NS records.
NS records for this zone are defined at joboo.de.
NS records for this zone are defined at joboo.de.
Question and response
Question
dig hr.joboo.de. NS
Answer
The response has no answer records.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0