mail.speedbone.de has no NS records.
NS records for this zone are defined at speedbone.de.
NS records for this zone are defined at speedbone.de.
Question and response
Question
dig mail.speedbone.de. NS
Answer
The response has no answer records.
Authority
speedbone.de. 3600 SOA ns1.speedbone.de. hostmaster.speedbone.de. 2021072219 28800 7200 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0