Robtex

Up: 189.45.248.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 189.45.252.0/23
Down right: 189.45.254.0/23

IP	Type	Hostname
189.45.252.5	A+PTR	terra.webecia.net
189.45.253.235	PTR	189-45-253-235.ibtelecom.net.br
189.45.254.130	PTR	189.45.254.130.lte.tgn.network
189.45.254.130	A	zrt3.formfast.com.br
189.45.255.255	PTR	189.45.255.255.lte.tgn.network