rh.dynamdns.de has no NS records.
NS records for this zone are defined at dynamdns.de.
NS records for this zone are defined at dynamdns.de.
Question and response
Question
dig rh.dynamdns.de. NS
Answer
The response has no answer records.
Authority
dynamdns.de. 60 SOA ns.owe.de. hostmaster.owe.de. 5127 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0