Robtex

Up: 177.200.42.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 177.200.43.0/25
Down right: 177.200.43.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
177.200.43.36	PTR	ip177-200-43-36.br27.com.br
177.200.43.36	A	dublin.ifs.edu.br
177.200.43.36	A	dublin.cefetse.edu.br
177.200.43.37	PTR	ip177-200-43-37.br27.com.br
177.200.43.37	A	ifs.edu.br
177.200.43.37	A	thor.ifs.edu.br