237.128-25.55.112.212.in-addr.arpa has no NS records.
NS records for this zone are defined at 128-25.55.112.212.in-addr.arpa.
NS records for this zone are defined at 128-25.55.112.212.in-addr.arpa.
Question and response
Question
dig 237.128-25.55.112.212.in-addr.arpa. NS
Answer
The response has no answer records.
Authority
128-25.55.112.212.in-addr.arpa. 3600 SOA ns1.itsystem.se. hostmaster.itsystem.local. 24 900 600 86400 3600
Additional
. 0 OPT ; payload 4000, xrcode 0, version 0, flags 0