1.0.7.175.210.in-addr.arpa has no NS records.
NS records for this zone are defined at 0.7.175.210.in-addr.arpa.
NS records for this zone are defined at 0.7.175.210.in-addr.arpa.
Question and response
Question
dig 1.0.7.175.210.in-addr.arpa. NS
Answer
The response has no answer records.
Authority
0.7.175.210.in-addr.arpa. 3600 SOA ns1.inetidc.jp. postmaster.inet.co.jp. 2014050801 3600 900 86400 3600
Additional
. 0 OPT ; payload 1410, xrcode 0, version 0, flags 0