mail.johanneskr.de has no NS records.
NS records for this zone are defined at johanneskr.de.
NS records for this zone are defined at johanneskr.de.
Question and response
Question
dig mail.johanneskr.de. NS
Answer
The response has no answer records.
Authority
johanneskr.de. 1800 SOA guy.ns.cloudflare.com. dns.cloudflare.com. 2399120484 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0