db.securepay.com.au has no NS records.
NS records for this zone are defined at securepay.com.au.
NS records for this zone are defined at securepay.com.au.
Question and response
Question
dig db.securepay.com.au. NS
Answer
The response has no answer records.
Authority
securepay.com.au. 900 SOA ns-860.awsdns-43.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0