131.128-28.62.219.195.in-addr.arpa has no NS records.
NS records for this zone are defined at 128-28.62.219.195.in-addr.arpa.
NS records for this zone are defined at 128-28.62.219.195.in-addr.arpa.
Question and response
Question
dig 131.128-28.62.219.195.in-addr.arpa. NS
Answer
The response has no answer records.
Authority
128-28.62.219.195.in-addr.arpa. 300 SOA a1-100.akam.net. hostmaster.128-28.62.219.195.in-addr.arpa. 2020042100 3600 600 604800 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0