Robtex

Up: 123.192.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 123.192.16.0/22
Down right: 123.192.20.0/22

IP	Type	Hostname
123.192.16.20	A	123-192-16-20.dynamic.kbronet.com.tw
123.192.16.27	A	holjact.com
123.192.16.29	A	123-192-16-29.dynamic.kbronet.com.tw
123.192.16.32	PTR	123-192-16-32.dynamic.kbronet.com.tw
123.192.16.53	A	123-192-16-53.dynamic.kbronet.com.tw
123.192.16.61	A	123-192-16-61.dynamic.kbronet.com.tw
123.192.16.73	A+PTR	123-192-16-73.dynamic.kbronet.com.tw
123.192.16.241	PTR	123-192-16-241.dynamic.kbronet.com.tw
123.192.17.9	PTR	123-192-17-9.dynamic.kbronet.com.tw
123.192.17.91	A+PTR	123-192-17-91.dynamic.kbronet.com.tw
123.192.17.153	PTR	123-192-17-153.dynamic.kbronet.com.tw
123.192.18.13	A	123-192-18-13.dynamic.kbronet.com.tw
123.192.18.33	PTR	123-192-18-33.dynamic.kbronet.com.tw
123.192.18.50	A+PTR	123-192-18-50.dynamic.kbronet.com.tw
123.192.18.58	A	123-192-18-58.dynamic.kbronet.com.tw
123.192.18.61	A	123-192-18-61.dynamic.kbronet.com.tw
123.192.18.170	A+PTR	123-192-18-170.dynamic.kbronet.com.tw
123.192.18.241	PTR	123-192-18-241.dynamic.kbronet.com.tw
123.192.19.12	A	123-192-19-12.dynamic.kbronet.com.tw
123.192.19.227	PTR	123-192-19-227.dynamic.kbronet.com.tw
123.192.20.2	A+PTR	123-192-20-2.dynamic.kbronet.com.tw
123.192.20.17	A	123-192-20-17.dynamic.kbronet.com.tw
123.192.20.113	A+PTR	123-192-20-113.dynamic.kbronet.com.tw
123.192.20.184	PTR	123-192-20-184.dynamic.kbronet.com.tw
123.192.20.211	A	stevendaylite.com
123.192.21.3	A+PTR	123-192-21-3.dynamic.kbronet.com.tw
123.192.21.51	A	123-192-21-51.dynamic.kbronet.com.tw
123.192.21.155	PTR	123-192-21-155.dynamic.kbronet.com.tw
123.192.22.2	PTR	123-192-22-2.dynamic.kbronet.com.tw
123.192.22.41	A	123-192-22-41.dynamic.kbronet.com.tw
123.192.22.225	A+PTR	123-192-22-225.dynamic.kbronet.com.tw
123.192.23.2	A+PTR	123-192-23-2.dynamic.kbronet.com.tw
123.192.23.154	A+PTR	123-192-23-154.dynamic.kbronet.com.tw
123.192.23.155	A	123-192-23-155.dynamic.kbronet.com.tw