mx.unitymedia.de has no NS records.
NS records for this zone are defined at unitymedia.de.
NS records for this zone are defined at unitymedia.de.
Question and response
Question
dig mx.unitymedia.de. NS
Answer
The response has no answer records.
Authority
unitymedia.de. 7200 SOA ns1.vodafone-ip.de. hostmaster.adm.arcor.net. 2026022400 28800 14400 1814400 7200
Additional
. 0 OPT ; payload 1460, xrcode 0, version 0, flags 0