mail.servercow.de has no NS records.
NS records for this zone are defined at servercow.de.
NS records for this zone are defined at servercow.de.
Question and response
Question
dig mail.servercow.de. NS
Answer
The response has no answer records.
Authority
servercow.de. 86400 SOA angus.ns.servercow.de. hostmaster.servercow.de. 2026030501 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0