Robtex

Up: 187.125.128.0/17
Can't show all results, try to descend to a more specific CIDR
Down left: 187.125.128.0/19
Down right: 187.125.160.0/19
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
187.125.133.2	PTR	1871251332.telemar.net.br
187.125.133.130	PTR	187125133130.telemar.net.br
187.125.171.1	PTR	1871251711.telemar.net.br
187.125.171.8	PTR	1871251718.telemar.net.br
187.125.171.30	PTR	18712517130.telemar.net.br
187.125.171.30	A	ns3.prestadorcbmp.com.br
187.125.171.30	A	ns3.cielo.com.br
187.125.181.126	PTR	187125181126.telemar.net.br