mail01.trustcsi.com has no NS records.
NS records for this zone are defined at trustcsi.com.
NS records for this zone are defined at trustcsi.com.
Question and response
Question
dig mail01.trustcsi.com. NS
Answer
The response has no answer records.
Authority
trustcsi.com. 600 SOA gns1.trustcsi.com. hostmaster.cpcnet-hk.com. 2024070501 10800 3600 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0