chat.mirae.net has no NS records.
NS records for this zone are defined at mirae.net.
NS records for this zone are defined at mirae.net.
Question and response
Question
dig chat.mirae.net. NS
Answer
The response has no answer records.
Authority
mirae.net. 600 SOA mirae.net. root.mirae.net. 2011122101 3600 1200 864000 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0