mo01.vodafone.de has no NS records.
NS records for this zone are defined at vodafone.de.
NS records for this zone are defined at vodafone.de.
Question and response
Question
dig mo01.vodafone.de. NS
Answer
The response has no answer records.
Authority
vodafone.de. 900 SOA ns-admin.vodafone.com. hostmaster.vodafone.com. 2008077351 14400 1440 604800 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0