Robtex

Up: 189.28.224.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 189.28.224.0/22
Down right: 189.28.228.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
189.28.224.26	PTR	189-28-224-26.clientes.cilnet.com.br
189.28.224.70	A	ns3.swork.com.br
189.28.224.71	A	ns4.swork.com.br
189.28.224.132	A	mail-itu.mittelsdorf.com.br
189.28.224.132	A	mail3.mittelsdorf.me
189.28.224.132	A	mail-itu.static.terrasdesaojose2.com
189.28.224.208	PTR	189-28-224-208.clientes.cilnet.com.br
189.28.224.251	A+PTR	mail.terlizzi.com.br
189.28.225.131	PTR	189-28-225-131.wireless.dynamic.cqo1.sp.faster.net.br