Robtex

Up: 120.50.16.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 120.50.16.0/23
Down right: 120.50.18.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
120.50.16.36	PTR	new-assigned-from-apnic-20-03-2008.telnet-bd.com
120.50.16.69	PTR	new-assigned-from-apnic-20-03-2008.telnet.net.bd
120.50.16.114	PTR	new-assigned-from-apnic-20-03-2008.telnet.net.bd
120.50.16.130	PTR	new-assigned-from-apnic-20-03-2008.telnet.net.bd
120.50.17.54	A	rultest.com
120.50.17.62	PTR	new-assigned-from-apnic-20-03-2008.telnet.net.bd
120.50.17.62	A	jamuka.gov.bd
120.50.17.62	A	porjotok.com.bd
120.50.17.118	PTR	new-assigned-from-apnic-20-03-2008.telnet.net.bd
120.50.17.226	PTR	new-assigned-from-apnic-20-03-2008.telnet-bd.com
120.50.17.242	PTR	smtp.unilliance.com
120.50.17.242	A	mail.unilliance.com
120.50.17.244	PTR	new-assigned-from-apnic-20-03-2008.telnet.net.bd
120.50.17.248	PTR	new-assigned-from-apnic-20-03-2008.telnet.net.bd
120.50.17.251	PTR	new-assigned-from-apnic-20-03-2008.telnet-bd.com
120.50.18.6	PTR	new-assigned-from-apnic-20-03-2008.telnet.net.bd
120.50.18.14	PTR	new-assigned-from-apnic-20-03-2008.telnet.net.bd
120.50.18.42	PTR	new-assigned-from-apnic-20-03-2008.telnet.net.bd
120.50.18.58	PTR	new-assigned-from-apnic-20-03-2008.telnet-bd.com
120.50.18.177	PTR	new-assigned-from-apnic-20-03-2008.telnet.net.bd
120.50.18.211	PTR	new-assigned-from-apnic-20-03-2008.telnet.net.bd
120.50.18.211	A	lankabangla.com
120.50.18.227	PTR	new-assigned-from-apnic-20-03-2008.telnet-bd.com
120.50.18.227	A	mail.auragroup.com.bd
120.50.19.35	PTR	new-assigned-from-apnic-20-03-2008.telnet-bd.com
120.50.19.35	A	harpoonsecurities.com
120.50.19.50	PTR	new-assigned-from-apnic-20-03-2008.telnet.net.bd
120.50.19.101	PTR	new-assigned-from-apnic-20-03-2008.telnet.net.bd
120.50.19.101	A	milil.com.bd
120.50.19.101	A	www.milil.com.bd