30.0-27.62.210.62.in-addr.arpa has no NS records.
NS records for this zone are defined at 0-27.62.210.62.in-addr.arpa.
NS records for this zone are defined at 0-27.62.210.62.in-addr.arpa.
Question and response
Question
dig 30.0-27.62.210.62.in-addr.arpa. NS
Answer
The response has no answer records.
Authority
0-27.62.210.62.in-addr.arpa. 86400 SOA dns2.ubunet.es. root.dns2.ubunet.es. 12 28800 7200 2419200 604800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0