mailgateway02.cpcnet.com has no NS records.
NS records for this zone are defined at cpcnet.com.
NS records for this zone are defined at cpcnet.com.
Question and response
Question
dig mailgateway02.cpcnet.com. NS
Answer
The response has no answer records.
Authority
cpcnet.com. 600 SOA ns1.hk.net. hostmaster.citictel-cpc.com. 2019091101 10800 3600 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0