50.48-29.108.20.62.in-addr.arpa has no NS records.
NS records for this zone are defined at 48-29.108.20.62.in-addr.arpa.
NS records for this zone are defined at 48-29.108.20.62.in-addr.arpa.
Question and response
Question
dig 50.48-29.108.20.62.in-addr.arpa. NS
Answer
The response has no answer records.
Authority
48-29.108.20.62.in-addr.arpa. 3600 SOA dns1.tankbar.com. hostmaster.tankbar.com. 18 900 600 86400 3600
Additional
. 0 OPT ; payload 4000, xrcode 0, version 0, flags 0