Robtex

Up: 168.181.168.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 168.181.168.0/25
Down right: 168.181.168.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
168.181.168.0	PTR	168.181.168.0.spdconnect.net.br
168.181.168.2	A+PTR	ns1.speedconnect.etc.br
168.181.168.2	A	pop.speedconnect.etc.br
168.181.168.2	A	net.speedconnect.etc.br
168.181.168.4	A+PTR	ns2.speedconnect.etc.br
168.181.168.11	PTR	168.181.168.11.spdconnect.net.br
168.181.168.11	A	ns1.spdconnect.net.br
168.181.168.12	A	ns2.spdconnect.net.br