mx.sgnic.sg has no NS records.
NS records for this zone are defined at sgnic.sg.
NS records for this zone are defined at sgnic.sg.
Question and response
Question
dig mx.sgnic.sg. NS
Answer
The response has no answer records.
Authority
sgnic.sg. 3600 SOA ps.sgnic.sg. postmaster.sgnic.sg. 2349569781 21600 3600 604800 3600
Additional
. 0 OPT ; payload 1452, xrcode 0, version 0, flags 0