Robtex

Up: 131.0.96.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 131.0.96.0/23
Down right: 131.0.98.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
131.0.96.18	PTR	96.0.131.18-customer-fttx.brphonia.com.br
131.0.96.30	PTR	96.0.131.30-customer-fttx.brphonia.com.br
131.0.96.37	PTR	96.0.131.37-customer-fttx.brphonia.com.br
131.0.96.74	A	fahor.com.br
131.0.96.85	A	mail.tecnicon.com.br
131.0.96.90	PTR	96.0.131.90-customer-fttx.brphonia.com.br
131.0.96.90	A	theguardianteam.com.br
131.0.96.90	A	theguardian.theguardianteam.com.br
131.0.96.194	PTR	96.0.131.194-customer-fttx.brphonia.com.br
131.0.96.194	A	mail.fema.com.br
131.0.96.194	A	home.radiofema.com.br
131.0.99.62	PTR	99.0.131.62-customer-fttx.brphonia.com.br
131.0.99.62	A	teexize.com