Robtex

Up: 121.50.176.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 121.50.176.0/22
Down right: 121.50.180.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
121.50.176.2	PTR	121.50-176-host2.chuan-chan.com.tw
121.50.176.2	A	ns0.1zdns.com
121.50.176.7	A	apuremail.com
121.50.176.9	A	hiwebmail.com
121.50.176.10	A	upd3.gclub888.com
121.50.176.17	A+PTR	paper.e-info.org.tw
121.50.176.17	A+PTR	vps.e-info.org.tw
121.50.176.17	A	www.e-info.tw
121.50.176.24	PTR	121.50-176-host24.chuan-chan.com.tw
121.50.176.26	PTR	121.50-176-host26.chuan-chan.com.tw
121.50.176.42	PTR	121.50-176-host42.chuan-chan.com.tw
121.50.176.137	PTR	121.50-176-host137.chuan-chan.com.tw
121.50.177.17	PTR	121.50-177-host17.chuan-chan.com.tw
121.50.177.25	PTR	121.50-177-host25.chuan-chan.com.tw
121.50.178.5	A	laa.org.tw
121.50.178.17	PTR	121.50-178-host17.chuan-chan.com.tw
121.50.179.17	PTR	121.50-179-host17.chuan-chan.com.tw
121.50.179.20	A+PTR	mx2.onionelectronic.com
121.50.179.30	A+PTR	mx1.onionelectronic.com
121.50.179.30	A	onionelectronic.com
121.50.179.86	PTR	121-50-179-86.chuan-chan.com.tw
121.50.179.86	A	getwdc.i-katu.com
121.50.179.107	PTR	121-50-179-107.chuan-chan.com.tw
121.50.179.107	A	system-nomail.info
121.50.179.107	A	mail.clctel.com
121.50.179.114	PTR	121-50-179-114.chuan-chan.com.tw
121.50.179.114	A	mx1.x8xxxxxxxx.com
121.50.179.171	PTR	121-50-179-171.chuan-chan.com.tw
121.50.179.171	A	trede-yx.com
121.50.179.171	A	yx-tw.com
121.50.180.17	PTR	121.50-180-host17.chuan-chan.com.tw
121.50.180.126	PTR	121.50-180-host126.chuan-chan.com.tw
121.50.181.17	PTR	121.50-181-host17.chuan-chan.com.tw
121.50.181.34	A	zhongyoupt.com
121.50.181.134	PTR	121.50-181-host134.chuan-chan.com.tw
121.50.181.134	A	www.lotushill.com.tw
121.50.181.138	A	chumii.com
121.50.182.17	PTR	121.50-182-host17.chuan-chan.com.tw
121.50.183.17	PTR	121.50-183-host17.chuan-chan.com.tw