141.128.199.234.202.in-addr.arpa has no NS records.
NS records for this zone are defined at 128.199.234.202.in-addr.arpa.
NS records for this zone are defined at 128.199.234.202.in-addr.arpa.
Question and response
Question
dig 141.128.199.234.202.in-addr.arpa. NS
Answer
The response has no answer records.
Authority
128.199.234.202.in-addr.arpa. 600 SOA ns6-tk01.ocn.ad.jp. postmaster.nttnavi.co.jp. 2016091200 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0