131.128-255.203.187.81.in-addr.arpa has no NS records.
NS records for this zone are defined at 128-255.203.187.81.in-addr.arpa.
NS records for this zone are defined at 128-255.203.187.81.in-addr.arpa.
Question and response
Question
dig 131.128-255.203.187.81.in-addr.arpa. NS
Answer
The response has no answer records.
Authority
128-255.203.187.81.in-addr.arpa. 8139 SOA ns0.grinton.net. postmaster.grinton.net. 2025240415 10800 3600 2419200 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0