ns2.cuhk.edu.hk
The domain ns2.cuhk.edu.hk answers at IP address 137.189.6.21. Mail for ns2.cuhk.edu.hk goes through 1 servers; the highest priority one is freedom.itsc.cuhk.edu.hk.
A A records
- 137.189.6.21 1981s
AAAA AAAA records
- 2405:3000:3:6::15 10800s
MX MX records
- 100 freedom.itsc.cuhk.edu.hk 10800s
What each record means
- A and AAAA: the server IP address, in IPv4 and IPv6.
- MX: the servers that receive the domain mail. The number is the priority; the lowest is tried first.
- NS: the name servers, which have the final say over the domain DNS.
- TXT: free text. Mostly used for SPF, DKIM and DMARC, and to verify ownership with third parties.
- TTL: how many seconds the record may be cached before asking again.
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