mail01.bchk.com.hk has no NS records.
NS records for this zone are defined at bchk.com.hk.
NS records for this zone are defined at bchk.com.hk.
Question and response
Question
dig mail01.bchk.com.hk. NS
Answer
The response has no answer records.
Authority
bchk.com.hk. 3600 SOA host1.cntech.net. webmaster.bchk.com.hk. 2026021324 1800 900 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0