137.136.208.119.121.in-addr.arpa has no NS records.
NS records for this zone are defined at 136.208.119.121.in-addr.arpa.
NS records for this zone are defined at 136.208.119.121.in-addr.arpa.
Question and response
Question
dig 137.136.208.119.121.in-addr.arpa. NS
Answer
The response has no answer records.
Authority
136.208.119.121.in-addr.arpa. 1200 SOA ns6-tk01.ocn.ad.jp. sys-cc.ntt.com. 2023030601 86400 3600 604800 1200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0