Reverse DNS Lookup for 140.112.24.28

Searching for 28.24.112.140.in-addr.arpa. PTR record at M.ROOT-SERVERS.NET. [202.12.27.33] ...took 15 ms
Searching for 28.24.112.140.in-addr.arpa. PTR record at a.in-addr-servers.arpa. [199.180.182.53] ...took 90 ms

Searching for u.arin.net. A record at M.ROOT-SERVERS.NET. [202.12.27.33] ...took 14 ms
Searching for u.arin.net. A record at b.gtld-servers.net. [192.33.14.30] ...took 31 ms
Searching for u.arin.net. A record at ns1.arin.net. [199.212.0.108] ...took 93 ms

Searching for 28.24.112.140.in-addr.arpa. PTR record at u.arin.net. [204.61.216.50] ...took 6 ms

Searching for news.ntu.edu.tw. A record at M.ROOT-SERVERS.NET. [202.12.27.33] ...took 15 ms
Searching for news.ntu.edu.tw. A record at anytld.apnic.net. [202.12.31.53] ...took 16 ms
Searching for news.ntu.edu.tw. A record at edudns-c2.edu.tw. [140.111.233.4] ...took 208 ms
Searching for news.ntu.edu.tw. A record at dns.ntu.edu.tw. [140.112.254.4] ...took 254 ms

Searching for 28.24.112.140.in-addr.arpa. PTR record at news.ntu.edu.tw. [140.112.254.2] Timed out while trying to resolve 28.24.112.140.in-addr.arpa./PTR, id=42899
Searching for 28.24.112.140.in-addr.arpa. PTR record at ntu3.ntu.edu.tw. [140.112.2.2] ...took 258 ms
SERVFAIL
Searching for 28.24.112.140.in-addr.arpa. PTR record at dns.ntu.edu.tw. [140.112.254.4] ...took 260 ms

Domain	Type	TTL	Answer
28.24.112.140.in-addr.arpa.	PTR	14400	ip24-28.wifi.cc.ntu.edu.tw.

Total elapsed query time: 3,261 ms