mail.server-hotel-berlin.net has no NS records.
NS records for this zone are defined at server-hotel-berlin.net.
NS records for this zone are defined at server-hotel-berlin.net.
Question and response
Question
dig mail.server-hotel-berlin.net. NS
Answer
The response has no answer records.
Authority
server-hotel-berlin.net. 38400 SOA ns1.dns-hotel.net. hm.bb-one.net. 2025112600 10800 3600 604800 38400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0