Robtex

Up: 200.41.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 200.41.24.0/22
Down right: 200.41.28.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
200.41.28.1	PTR	200-41-28-1.static.impsat.net.ar
200.41.28.2	PTR	200-41-28-2.static.impsat.net.ar
200.41.28.10	PTR	200-41-28-10.static.impsat.net.ar
200.41.28.11	PTR	200-41-28-11.static.impsat.net.ar
200.41.28.16	PTR	200-41-28-16.static.impsat.net.ar
200.41.28.17	PTR	200-41-28-17.static.impsat.net.ar
200.41.28.24	PTR	200-41-28-24.static.impsat.net.ar
200.41.28.33	PTR	lan1-1.uade.org.ar
200.41.28.34	PTR	lan1-2.uade.org.ar
200.41.28.41	PTR	lan1-8.uade.org.ar
200.41.28.42	PTR	lan1-9.uade.org.ar
200.41.28.43	PTR	lan1-10.uade.org.ar
200.41.28.48	PTR	200-41-28-48.static.impsat.net.ar
200.41.28.49	PTR	lan2-1.uade.org.ar
200.41.28.51	PTR	lan2-3.uade.org.ar
200.41.28.56	PTR	lan2-7.uade.org.ar
200.41.28.57	PTR	lan2-8.uade.org.ar
200.41.28.59	PTR	lan2-10.uade.org.ar
200.41.28.64	PTR	200-41-28-64.static.impsat.net.ar
200.41.28.73	PTR	200-41-28-73.static.impsat.net.ar
200.41.28.82	PTR	200-41-28-82.static.impsat.net.ar
200.41.28.89	PTR	200-41-28-89.static.impsat.net.ar
200.41.28.96	PTR	200-41-28-96.static.impsat.net.ar
200.41.28.106	PTR	200-41-28-106.static.impsat.net.ar
200.41.28.113	PTR	200-41-28-113.static.impsat.net.ar
200.41.28.114	PTR	200-41-28-114.static.impsat.net.ar
200.41.28.115	PTR	tpssa.com.ar
200.41.28.120	PTR	200-41-28-120.static.impsat.net.ar
200.41.28.121	PTR	200-41-28-121.static.impsat.net.ar
200.41.28.137	PTR	200-41-28-137.static.impsat.net.ar
200.41.28.139	PTR	200-41-28-139.static.impsat.net.ar
200.41.28.144	PTR	200-41-28-144.static.impsat.net.ar
200.41.28.148	A	www.sistemas.segurosrivadavia.com
200.41.28.148	A	sistemas.segurosrivadavia.com
200.41.28.149	A	mail.segurosrivadavia.com
200.41.28.149	A	mutualrivadavia.com
200.41.28.155	PTR	200-41-28-155.static.impsat.net.ar
200.41.28.163	PTR	snotesbel-ext1.gasnaturalban.com.ar
200.41.28.168	PTR	200-41-28-168.static.impsat.net.ar
200.41.28.169	PTR	200-41-28-169.static.impsat.net.ar
200.41.28.176	PTR	200-41-28-176.static.impsat.net.ar
200.41.28.177	PTR	200-41-28-177.static.impsat.net.ar
200.41.28.184	PTR	200-41-28-184.static.impsat.net.ar
200.41.28.187	PTR	200-41-28-187.static.impsat.net.ar
200.41.28.194	PTR	200-41-28-194.static.impsat.net.ar
200.41.28.195	PTR	195.columbia.com.ar
200.41.28.200	PTR	200-41-28-200.static.impsat.net.ar
200.41.28.209	PTR	200-41-28-209.static.impsat.net.ar
200.41.28.210	PTR	200-41-28-210.static.impsat.net.ar
200.41.28.216	PTR	200-41-28-216.static.impsat.net.ar
200.41.28.218	PTR	200-41-28-218.static.impsat.net.ar
200.41.28.225	PTR	200-41-28-225.static.impsat.net.ar
200.41.28.226	A+PTR	mx1l.secco.com.ar
200.41.28.226	A	portal.jfs.com.ar
200.41.28.226	A	mail.seccouy.com
200.41.28.227	PTR	www.secco.com.ar
200.41.28.240	PTR	200-41-28-240.static.impsat.net.ar
200.41.28.250	PTR	200-41-28-250.static.impsat.net.ar
200.41.28.251	PTR	200-41-28-251.static.impsat.net.ar
200.41.29.0	PTR	200-41-29-0.static.impsat.net.ar
200.41.29.1	PTR	200-41-29-1.static.impsat.net.ar
200.41.29.3	PTR	200-41-29-3.static.impsat.net.ar
200.41.29.8	PTR	200-41-29-8.static.impsat.net.ar
200.41.29.9	PTR	200-41-29-9.static.impsat.net.ar
200.41.29.10	PTR	200-41-29-10.static.impsat.net.ar
200.41.29.16	PTR	200-41-29-16.static.impsat.net.ar
200.41.29.17	PTR	200-41-29-17.static.impsat.net.ar
200.41.29.24	PTR	200-41-29-24.static.impsat.net.ar
200.41.29.26	PTR	200-41-29-26.static.impsat.net.ar
200.41.29.33	PTR	200-41-29-33.static.impsat.net.ar
200.41.29.41	PTR	200-41-29-41.static.impsat.net.ar
200.41.29.42	PTR	200-41-29-42.static.impsat.net.ar
200.41.29.43	PTR	200-41-29-43.static.impsat.net.ar
200.41.29.50	PTR	200-41-29-50.static.impsat.net.ar
200.41.29.59	PTR	200-41-29-59.static.impsat.net.ar
200.41.29.66	PTR	200-41-29-66.static.impsat.net.ar
200.41.29.67	PTR	200-41-29-67.static.impsat.net.ar
200.41.29.73	PTR	200-41-29-73.static.impsat.net.ar
200.41.29.80	PTR	200-41-29-80.static.impsat.net.ar
200.41.29.83	PTR	200-41-29-83.static.impsat.net.ar
200.41.29.88	PTR	200-41-29-88.static.impsat.net.ar
200.41.29.90	PTR	200-41-29-90.static.impsat.net.ar
200.41.29.96	PTR	200-41-29-96.static.impsat.net.ar
200.41.29.98	PTR	200-41-29-98.static.impsat.net.ar
200.41.29.99	PTR	200-41-29-99.static.impsat.net.ar
200.41.29.105	PTR	200-41-29-105.static.impsat.net.ar
200.41.29.107	PTR	200-41-29-107.static.impsat.net.ar
200.41.29.112	PTR	200-41-29-112.static.impsat.net.ar
200.41.29.113	PTR	200-41-29-113.static.impsat.net.ar
200.41.29.114	PTR	200-41-29-114.static.impsat.net.ar
200.41.29.120	PTR	200-41-29-120.static.impsat.net.ar
200.41.29.129	PTR	200-41-29-129.static.impsat.net.ar
200.41.29.130	PTR	mail.cosepad.com.ar
200.41.29.146	PTR	200-41-29-146.static.impsat.net.ar
200.41.29.152	PTR	200-41-29-152.static.impsat.net.ar
200.41.29.154	PTR	200-41-29-154.static.impsat.net.ar
200.41.29.160	PTR	200-41-29-160.static.impsat.net.ar
200.41.29.162	PTR	200-41-29-162.static.impsat.net.ar
200.41.29.169	PTR	200-41-29-169.static.impsat.net.ar
200.41.29.178	PTR	200-41-29-178.static.impsat.net.ar
200.41.29.185	PTR	200-41-29-185.static.impsat.net.ar
200.41.29.200	PTR	200-41-29-200.static.impsat.net.ar
200.41.29.203	PTR	200-41-29-203.static.impsat.net.ar
200.41.29.217	PTR	200-41-29-217.static.impsat.net.ar
200.41.29.224	PTR	200-41-29-224.static.impsat.net.ar
200.41.29.234	PTR	200-41-29-234.static.impsat.net.ar
200.41.29.241	PTR	200-41-29-241.static.impsat.net.ar
200.41.29.243	PTR	200-41-29-243.static.impsat.net.ar
200.41.29.248	PTR	200-41-29-248.static.impsat.net.ar