Robtex

Up: 45.230.224.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 45.230.224.0/23
Down right: 45.230.226.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
45.230.224.10	A+PTR	dns1.piraja.net.br
45.230.224.10	A	pop.piraja.net.br
45.230.224.10	A	net.velocimetro.piraja.net.br
45.230.224.11	PTR	dns2.piraja.net.br
45.230.227.130	A+PTR	130-227-230-45.piraja.net.br