fourth.currentnamed.de has no NS records.
NS records for this zone are defined at currentnamed.de.
NS records for this zone are defined at currentnamed.de.
Question and response
Question
dig fourth.currentnamed.de. NS
Answer
The response has no answer records.
Authority
currentnamed.de. 3601 SOA dns1.registrar-servers.com. hostmaster.registrar-servers.com. 1772535469 43200 3600 604800 3601
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0