Robtex

Up: 123.110.160.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 123.110.160.0/22
Down right: 123.110.164.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
123.110.160.123	PTR	123-110-160-123.best.dynamic.tbcnet.net.tw
123.110.160.161	PTR	123-110-160-161.best.dynamic.tbcnet.net.tw
123.110.161.4	PTR	123-110-161-4.best.dynamic.tbcnet.net.tw
123.110.161.19	PTR	123-110-161-19.best.dynamic.tbcnet.net.tw
123.110.161.91	PTR	123-110-161-91.best.dynamic.tbcnet.net.tw
123.110.161.122	PTR	123-110-161-122.best.dynamic.tbcnet.net.tw
123.110.161.122	A	www.pitour.com.tw
123.110.161.122	A	pitour.com.tw
123.110.161.129	PTR	123-110-161-129.best.dynamic.tbcnet.net.tw
123.110.161.183	A	ns3.rekmilk.at
123.110.161.201	PTR	123-110-161-201.best.dynamic.tbcnet.net.tw
123.110.161.240	PTR	123-110-161-240.best.dynamic.tbcnet.net.tw
123.110.162.3	PTR	123-110-162-3.best.dynamic.tbcnet.net.tw
123.110.162.18	PTR	123-110-162-18.best.dynamic.tbcnet.net.tw
123.110.162.32	PTR	123-110-162-32.best.dynamic.tbcnet.net.tw
123.110.162.48	PTR	123-110-162-48.best.dynamic.tbcnet.net.tw
123.110.162.56	PTR	123-110-162-56.best.dynamic.tbcnet.net.tw
123.110.162.113	PTR	123-110-162-113.best.dynamic.tbcnet.net.tw
123.110.162.211	PTR	123-110-162-211.best.dynamic.tbcnet.net.tw
123.110.162.234	PTR	123-110-162-234.best.dynamic.tbcnet.net.tw
123.110.163.154	PTR	123-110-163-154.best.dynamic.tbcnet.net.tw
123.110.163.202	PTR	123-110-163-202.best.dynamic.tbcnet.net.tw
123.110.163.219	PTR	123-110-163-219.best.dynamic.tbcnet.net.tw
123.110.164.89	PTR	123-110-164-89.best.dynamic.tbcnet.net.tw
123.110.164.152	PTR	123-110-164-152.best.dynamic.tbcnet.net.tw
123.110.164.200	PTR	123-110-164-200.best.dynamic.tbcnet.net.tw
123.110.164.227	PTR	123-110-164-227.best.dynamic.tbcnet.net.tw
123.110.165.3	PTR	123-110-165-3.best.dynamic.tbcnet.net.tw
123.110.165.16	PTR	123-110-165-16.best.dynamic.tbcnet.net.tw
123.110.165.88	PTR	123-110-165-88.best.dynamic.tbcnet.net.tw
123.110.165.144	PTR	123-110-165-144.best.dynamic.tbcnet.net.tw
123.110.165.184	PTR	123-110-165-184.best.dynamic.tbcnet.net.tw
123.110.165.192	PTR	123-110-165-192.best.dynamic.tbcnet.net.tw
123.110.165.194	PTR	123-110-165-194.best.dynamic.tbcnet.net.tw
123.110.165.208	PTR	123-110-165-208.best.dynamic.tbcnet.net.tw
123.110.165.217	PTR	123-110-165-217.best.dynamic.tbcnet.net.tw
123.110.165.224	PTR	123-110-165-224.best.dynamic.tbcnet.net.tw
123.110.165.226	PTR	123-110-165-226.best.dynamic.tbcnet.net.tw
123.110.166.43	PTR	123-110-166-43.best.dynamic.tbcnet.net.tw
123.110.166.80	PTR	123-110-166-80.best.dynamic.tbcnet.net.tw
123.110.166.115	PTR	123-110-166-115.best.dynamic.tbcnet.net.tw
123.110.166.121	PTR	123-110-166-121.best.dynamic.tbcnet.net.tw
123.110.166.170	PTR	123-110-166-170.best.dynamic.tbcnet.net.tw
123.110.166.211	PTR	123-110-166-211.best.dynamic.tbcnet.net.tw
123.110.167.74	PTR	123-110-167-74.best.dynamic.tbcnet.net.tw
123.110.167.83	PTR	123-110-167-83.best.dynamic.tbcnet.net.tw
123.110.167.115	PTR	123-110-167-115.best.dynamic.tbcnet.net.tw
123.110.167.146	PTR	123-110-167-146.best.dynamic.tbcnet.net.tw
123.110.167.155	PTR	123-110-167-155.best.dynamic.tbcnet.net.tw
123.110.167.179	PTR	123-110-167-179.best.dynamic.tbcnet.net.tw
123.110.167.217	PTR	123-110-167-217.best.dynamic.tbcnet.net.tw