Zone apex
Start of authority
Email
Serial
201704440
Refresh
10m
Retry
5m
Expire
21d
Negative cache TTL
5m
Question and response
Question
dig dns2.cuhk.edu.hk. SOA
Answer
The response has no answer records.
Authority
cuhk.edu.hk. 300 SOA ddi-gm1.itsc.cuhk.edu.hk. hostmaster.cuhk.edu.hk. 201704440 600 300 1814400 300
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0