198.24.73.203.ptr.twnic.net.tw has no NS records.
NS records for this zone are defined at 24.73.203.ptr.twnic.net.tw.
NS records for this zone are defined at 24.73.203.ptr.twnic.net.tw.
Question and response
Question
dig 198.24.73.203.ptr.twnic.net.tw. NS
Answer
The response has no answer records.
Authority
24.73.203.ptr.twnic.net.tw. 10 SOA ptr1.twnic.net.tw. tech.twnic.net.tw. 8 3600 3600 604800 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0