ns4.apnic.NET has no NS records.
NS records for this zone are defined at apnic.NET.
NS records for this zone are defined at apnic.NET.
Question and response
Question
dig ns4.apnic.NET. NS
Answer
The response has no answer records.
Authority
apnic.net. 3600 SOA ns.apnic.net. dns-ops.apnic.net. 2020123479 3600 1800 691200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0