152.128.137.154.210.in-addr.arpa has no NS records.
NS records for this zone are defined at 128.137.154.210.in-addr.arpa.
NS records for this zone are defined at 128.137.154.210.in-addr.arpa.
Question and response
Question
dig 152.128.137.154.210.in-addr.arpa. NS
Answer
The response has no answer records.
Authority
128.137.154.210.in-addr.arpa. 1800 SOA rx7.mazda.co.jp. inetadm.RX7.mazda.co.jp. 2018032201 1800 100 1814400 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0