rerouting-de.mailtastic.com has no NS records.
NS records for this zone are defined at mailtastic.com.
NS records for this zone are defined at mailtastic.com.
Question and response
Question
dig rerouting1.germanywestcentral.cloudapp.azure.com. NS
Answer
The response has no answer records.
Authority
germanywestcentral.cloudapp.azure.com. 300 SOA ns1-08.azure-dns.com. azuredns-hostmaster.microsoft.com. 1 3600 300 2419200 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0