Robtex

Up: 203.187.0.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 203.187.0.0/21
Down right: 203.187.8.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.187.0.0	PTR	host-203-187-0-0.ip.kbtelecom.net
203.187.0.3	A+PTR	mg1.kbtelecom.net
203.187.0.4	A	mg2.kbtelecom.net
203.187.0.6	A	dns4.giga.net.tw
203.187.0.20	A	host-203-187-0-20.ip.kbtelecom.net
203.187.0.20	A	mailgate.kbtelecom.net
203.187.0.25	A	mail.bbtv.net.tw
203.187.0.66	A	host-203-187-0-66.ip.kbtelecom.net
203.187.0.80	A+PTR	host-203-187-0-80.ip.kbtelecom.net
203.187.0.122	A	host-203-187-0-122.ip.kbtelecom.net
203.187.0.147	PTR	host-203-187-0-147.ip.kbtelecom.net
203.187.0.147	A	mailgate.bbtv.tw
203.187.0.172	A	host-203-187-0-172.ip.kbtelecom.net
203.187.0.197	A	host-203-187-0-197.ip.kbtelecom.net
203.187.0.221	A	u0-221.u203-187.giga.net.tw
203.187.0.221	A	mailgate1.kbtelecom.net.tw
203.187.0.221	A	mailgate1.kbtelecom.net
203.187.0.224	A+PTR	host-203-187-0-224.ip.kbtelecom.net
203.187.1.1	A+PTR	ns7.giga.net.tw
203.187.1.21	A	host-203-187-1-21.ip.kbtelecom.net
203.187.1.168	A	host-203-187-1-168.ip.kbtelecom.net
203.187.1.180	A	u1-180.u203-187.giga.net.tw
203.187.1.180	A	member.giga.net.tw
203.187.1.200	A	news.giga.net.tw
203.187.4.0	A+PTR	host-203-187-4-0.ip.kbtelecom.net
203.187.4.8	A	bounce1.giga.net.tw
203.187.4.9	A	bounce2.giga.net.tw
203.187.4.10	A	bounce.giga.net.tw
203.187.4.19	A	host-203-187-4-19.ip.kbtelecom.net
203.187.4.25	A	cycable.giga.net.tw
203.187.4.30	A	host-203-187-4-30.ip.kbtelecom.net
203.187.4.38	A	host-203-187-4-38.ip.kbtelecom.net
203.187.4.42	A	nkcatv.com.tw
203.187.4.42	A	mail.nkcatv.com.tw
203.187.4.42	A	nkcatv.net.tw
203.187.4.58	A	host-203-187-4-58.ip.kbtelecom.net
203.187.4.59	A	host-203-187-4-59.ip.kbtelecom.net
203.187.4.60	A	host-203-187-4-60.ip.kbtelecom.net
203.187.4.66	A	host-203-187-4-66.ip.kbtelecom.net
203.187.4.68	A	host-203-187-4-68.ip.kbtelecom.net
203.187.4.73	A	host-203-187-4-73.ip.kbtelecom.net
203.187.4.77	A	host-203-187-4-77.ip.kbtelecom.net
203.187.4.80	A	host-203-187-4-80.ip.kbtelecom.net
203.187.4.85	A	host-203-187-4-85.ip.kbtelecom.net
203.187.4.91	A	host-203-187-4-91.ip.kbtelecom.net
203.187.4.92	A	host-203-187-4-92.ip.kbtelecom.net
203.187.4.98	A+PTR	host-203-187-4-98.ip.kbtelecom.net
203.187.4.99	A	host-203-187-4-99.ip.kbtelecom.net
203.187.4.113	A	host-203-187-4-113.ip.kbtelecom.net
203.187.4.124	A	host-203-187-4-124.ip.kbtelecom.net
203.187.4.128	A	host-203-187-4-128.ip.kbtelecom.net
203.187.4.178	A	host-203-187-4-178.ip.kbtelecom.net
203.187.4.196	A	host-203-187-4-196.ip.kbtelecom.net
203.187.4.222	A	host-203-187-4-222.ip.kbtelecom.net
203.187.7.1	PTR	hippasus.kbtelecom.net
203.187.7.1	A	hippasus.ix.giga.net.tw
203.187.7.1	A	ixdns.kbtelecom.net
203.187.7.2	PTR	icarus.ix.kbtelecom.net
203.187.7.90	A	hkevin.idv.tw
203.187.8.12	A	taipei-nis2.giga.net.tw
203.187.10.73	A	host-203-187-10-73.ip.kbtelecom.net
203.187.10.239	A	host-203-187-10-239.ip.kbtelecom.net
203.187.11.46	A	host-203-187-11-46.ip.kbtelecom.net
203.187.11.57	A	host-203-187-11-57.ip.kbtelecom.net
203.187.11.169	A	host-203-187-11-169.ip.kbtelecom.net
203.187.11.186	A	host-203-187-11-186.ip.kbtelecom.net
203.187.11.225	A+PTR	host-203-187-11-225.ip.kbtelecom.net
203.187.12.55	A	host-203-187-12-55.ip.kbtelecom.net
203.187.12.147	PTR	antispam.dmg.tv
203.187.13.14	A	host-203-187-13-14.ip.kbtelecom.net
203.187.14.72	A	host-203-187-14-72.ip.kbtelecom.net
203.187.14.107	A	host-203-187-14-107.ip.kbtelecom.net
203.187.14.112	A	friends.giga.net.tw
203.187.14.114	A	host-203-187-14-114.ip.kbtelecom.net
203.187.14.131	A	member.totalbb.net.tw
203.187.14.132	A	smtp3.totalbb.net.tw
203.187.14.133	A	smtp1.totalbb.net.tw
203.187.14.134	A	u14-134.u203-187.giga.net.tw
203.187.14.160	A	host-203-187-14-160.ip.kbtelecom.net
203.187.14.170	A	host-203-187-14-170.ip.kbtelecom.net
203.187.14.202	A	pop3.totalbb.net.tw
203.187.14.202	A	totalbb.net.tw
203.187.14.202	A	smtp.totalbb.net.tw
203.187.15.6	A	eric.giga.net.tw
203.187.15.15	A	coco.giga.net.tw
203.187.15.34	A+PTR	host-203-187-15-34.ip.kbtelecom.net
203.187.15.34	A	rfc.giga.net.tw
203.187.15.34	A	ftp.giga.net.tw
203.187.15.225	A+PTR	host-203-187-15-225.ip.kbtelecom.net