dns.clbgamevn.com has no NS records.
NS records for this zone are defined at clbgamevn.com.
NS records for this zone are defined at clbgamevn.com.
Question and response
Question
dig dns.clbgamevn.com. NS
Answer
The response has no answer records.
Authority
clbgamevn.com. 3600 SOA dns.clbgamevn.com. hostmaster.clbgamevn.com. 1483475281 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0