Robtex

Up: 170.81.40.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 170.81.41.0/25
Down right: 170.81.41.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
170.81.41.0	PTR	170-81-41-0.ferenz.com.br
170.81.41.1	PTR	170-81-41-1.ferenz.com.br
170.81.41.10	PTR	170-81-41-10.ferenz.com.br
170.81.41.10	A	lojasjet.com
170.81.41.13	PTR	ns3.svrbrasil.com.br
170.81.41.13	A	valoreconomico.tech
170.81.41.13	A	nutriamerican.com.br
170.81.41.14	PTR	ns4.svrbrasil.com.br
170.81.41.16	PTR	170-81-41-16.ferenz.com.br
170.81.41.16	A	infernusrp.com
170.81.41.83	A+PTR	ssdbr02s.ferenz.com.br
170.81.41.83	A	mutron.com.br
170.81.41.83	A	dc-34da2fb4a717.mustylex.com
170.81.41.100	PTR	sv-atos.advendns.org
170.81.41.100	A	falarwhats.com.br
170.81.41.101	PTR	170-81-41-101.ferenz.com.br
170.81.41.101	A	ns1.giovanoni.com.br
170.81.41.101	A	colegiocpp.com.br
170.81.41.102	PTR	sv-genesis.advendns.org
170.81.41.102	A	madeiraparatelhado.com
170.81.41.102	A	ns1.solidpisos.com.br
170.81.41.103	PTR	ns2.svgenesis.advendns.org
170.81.41.103	A	equipamentoswew.com
170.81.41.103	A	ragnapure.com
170.81.41.106	A+PTR	servidor.reisman.com.br
170.81.41.106	A	dns-master.reisman.com.br
170.81.41.106	A	fotosdevestidosdenoivas.com.br
170.81.41.107	A+PTR	ipv4-107.reisman.com.br
170.81.41.107	A	dns-slave.reisman.com.br
170.81.41.108	PTR	ipv4-108.reisman.com.br
170.81.41.108	A	betamc.batt.host
170.81.41.127	PTR	srv02.hostoo.io
170.81.41.127	A	sertes.com.br
170.81.41.127	A	dluzzi.com.br
170.81.41.163	PTR	gubax.com.br
170.81.41.163	A	gub.ax
170.81.41.164	PTR	170-81-41-164.ferenz.com.br
170.81.41.184	PTR	170-81-41-184.ferenz.com.br
170.81.41.184	A	ddtankiceworld.com
170.81.41.205	PTR	170-81-41-205.ferenz.com.br
170.81.41.205	A	brutal-co.com