86.64.214.137.163.in-addr.arpa has no NS records.
NS records for this zone are defined at 214.137.163.in-addr.arpa.
NS records for this zone are defined at 214.137.163.in-addr.arpa.
Question and response
Question
dig 86.64.214.137.163.in-addr.arpa. NS
Answer
The response has no answer records.
Authority
64.214.137.163.in-addr.arpa. 259 SOA ns2.nttcom.ne.jp. root.nttcom.ne.jp. 2024101001 10800 1800 2419200 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0