Robtex

Up: 187.39.80.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 187.39.88.0/22
Down right: 187.39.92.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
187.39.90.130	PTR	bb275a82.virtua.com.br
187.39.93.176	PTR	bb275db0.virtua.com.br
187.39.93.176	A	ip1.trevisomonitoramento.com.br
187.39.93.176	A	ip2.trevisomonitoramento.com.br
187.39.94.243	PTR	bb275ef3.virtua.com.br