70.65-123.228.5.72.in-addr.arpa has no NS records.
NS records for this zone are defined at 65-123.228.5.72.in-addr.arpa.
NS records for this zone are defined at 65-123.228.5.72.in-addr.arpa.
Question and response
Question
dig 70.65-123.228.5.72.in-addr.arpa. NS
Answer
The response has no answer records.
Authority
65-123.228.5.72.in-addr.arpa. 86400 SOA udns1.ultradns.net. operations.casabi.com. 2013010301 10800 3600 2592000 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0