123.112-28.231.225.130.in-addr.arpa has no NS records.
NS records for this zone are defined at 112-28.231.225.130.in-addr.arpa.
NS records for this zone are defined at 112-28.231.225.130.in-addr.arpa.
Question and response
Question
dig 123.112-28.231.225.130.in-addr.arpa. NS
Answer
The response has no answer records.
Authority
112-28.231.225.130.in-addr.arpa. 900 SOA ait-pibgm01.win.dtu.dk. dnsadmin.dtu.dk. 17 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0