gw01.m1net.com.sg has no NS records.
NS records for this zone are defined at m1net.com.sg.
NS records for this zone are defined at m1net.com.sg.
Question and response
Question
dig gw01.m1net.com.sg. NS
Answer
The response has no answer records.
Authority
m1net.com.sg. 600 SOA pridns.m1net.com.sg. hostmaster.m1net.com.sg. 2015042352 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0