38.0.91.7.211.in-addr.arpa has no NS records.
NS records for this zone are defined at 0.91.7.211.in-addr.arpa.
NS records for this zone are defined at 0.91.7.211.in-addr.arpa.
Question and response
Question
dig 38.0.91.7.211.in-addr.arpa. NS
Answer
The response has no answer records.
Authority
0.91.7.211.in-addr.arpa. 600 SOA dns0.tokai.or.jp. root.dns0.tokai.or.jp. 20250401 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0