Robtex

Up: 121.50.144.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 121.50.144.0/22
Down right: 121.50.148.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
121.50.144.1	A	mail.gridtw.com
121.50.144.1	A	gridtw.com
121.50.144.7	PTR	121-50-144-7.static-ip.asiawhere.com
121.50.144.8	PTR	mamu.com.tw
121.50.144.9	PTR	121-50-144-9.static-ip.asiawhere.com
121.50.144.9	A	mobileweb.tw
121.50.144.10	A	mnpl.info
121.50.144.14	PTR	121-50-144-14.static-ip.asiawhere.com
121.50.144.20	A	www.huashan.com.tw
121.50.144.25	PTR	121-50-144-25.static-ip.asiawhere.com
121.50.144.25	A	dylanbeattie.co.uk
121.50.144.27	PTR	121-50-144-27.static-ip.asiawhere.com
121.50.144.32	PTR	121-50-144-32.static-ip.asiawhere.com
121.50.144.33	PTR	121-50-144-33.static-ip.asiawhere.com
121.50.144.33	A	c2.channeleffect.com
121.50.144.36	PTR	121-50-144-36.static-ip.asiawhere.com
121.50.145.6	A	ec-security.org.tw
121.50.145.7	A	mail.bigcamera.com.tw
121.50.145.7	A	bigcamera.com.tw
121.50.145.8	PTR	121-50-145-8.static-ip.asiawhere.com
121.50.145.20	A	americanclub.org.tw
121.50.150.6	A	connexone.com
121.50.150.6	A	cloudmax.com.tw
121.50.150.21	A	www.serverwisdom.com
121.50.150.21	A	www.010101.com.tw
121.50.150.21	A	mail.codyson.com.tw
121.50.150.24	PTR	121-50-150-24.static-ip.asiawhere.com
121.50.150.25	A	hackerscan.com.tw
121.50.150.25	A	mail.hackerscan.com.tw
121.50.150.26	PTR	121-50-150-26.static-ip.asiawhere.com
121.50.150.27	PTR	121-50-150-27.static-ip.asiawhere.com
121.50.150.27	A	hackerscan.com.tw
121.50.150.27	A	domain.wis.com.tw
121.50.150.33	PTR	121-50-150-33.static-ip.asiawhere.com
121.50.150.41	PTR	121-50-150-41.static-ip.asiawhere.com
121.50.150.41	A	www.wis.com.tw
121.50.150.41	A	bestknockoffs.com