Robtex

Up: 170.81.42.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 170.81.42.0/25
Down right: 170.81.42.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
170.81.42.2	PTR	170-81-42-2.ferenz.com.br
170.81.42.2	A	microempreendedor.club
170.81.42.11	PTR	170-81-42-11.ferenz.com.br
170.81.42.11	A	ns1.jnethost.com.br
170.81.42.11	A	jnethost.com.br
170.81.42.13	PTR	170-81-42-13.ferenz.com.br
170.81.42.14	PTR	170-81-42-14.ferenz.com.br
170.81.42.14	A	ryl4friends.com
170.81.42.16	A	comprelisko.com.br
170.81.42.17	PTR	170-81-42-17.ferenz.com.br
170.81.42.17	A	facemarket.com.br
170.81.42.20	PTR	musthost.com.br
170.81.42.20	A	ns2.musthospedagem.com.br
170.81.42.20	A	ns2.musthost.com.br
170.81.42.42	PTR	ns1.ferenz.com.br
170.81.42.42	A	ns1.webair.net.br
170.81.42.42	A	ns1.grupospeednet.com.br
170.81.42.50	A+PTR	srv.vexhost.com.br
170.81.42.50	A	vexti.com.br
170.81.42.50	A	josemariarodrigues.com.br
170.81.42.52	PTR	170-81-42-52.ferenz.com.br
170.81.42.52	A	handfm.com
170.81.42.72	PTR	vps.maxware.com.br
170.81.42.72	A	ns.simquimica.com.br
170.81.42.72	A	ns.cia10.com.br
170.81.42.73	PTR	170-81-42-73.ferenz.com.br
170.81.42.73	A	vergulhos.servegame.com
170.81.42.74	PTR	vps.maxware.com.br
170.81.42.74	A	ns1.rodoservice.com.br
170.81.42.74	A	simquimica.com.br
170.81.42.79	PTR	170-81-42-79.ferenz.com.br
170.81.42.79	A	tales-global.servegame.com
170.81.42.79	A	talesglobal.com
170.81.42.90	PTR	170-81-42-90.ferenz.com.br
170.81.42.90	A	magnoalves.com.br
170.81.42.103	PTR	170-81-42-103.ferenz.com.br
170.81.42.103	A	imortalwow.com
170.81.42.106	A+PTR	ns2.spwhost.srv.br
170.81.42.106	A	spwhost.com.br
170.81.42.106	A	solucaosites.com.br
170.81.42.107	PTR	servidor01.spwhost.srv.br
170.81.42.107	A	startsistemas.com.br
170.81.42.107	A	ns1.spwhost.srv.br
170.81.42.136	PTR	170-81-42-136.ferenz.com.br
170.81.42.136	A	darknessofdynasty.com
170.81.42.179	PTR	170-81-42-179.ferenz.com.br
170.81.42.185	PTR	170-81-42-185.ferenz.com.br
170.81.42.185	A	esuspec.com
170.81.42.190	A	patuweb.com.br
170.81.42.201	PTR	sv-genesis.advendns.org
170.81.42.201	A	malasdireta.com
170.81.42.201	A	ns3.dualstudio.com.br
170.81.42.202	PTR	ns2.svgenesis.advendns.org
170.81.42.202	A	ns4.dualstudio.com.br
170.81.42.207	PTR	170-81-42-207.ferenz.com.br
170.81.42.226	A	ns1.betstar365.com
170.81.42.227	PTR	br2.pietroweb.com.br
170.81.42.227	A	ns2.betstar365.com
170.81.42.233	A	virtualrbm.com
170.81.42.245	PTR	170-81-42-245.ferenz.com.br
170.81.42.245	A	afainformatica.ddns.net
170.81.42.247	PTR	170-81-42-247.ferenz.com.br
170.81.42.247	A	shadowbaiak.sytes.net
170.81.42.248	PTR	170-81-42-248.ferenz.com.br
170.81.42.248	A	tiranosconquer.com
170.81.42.251	A+PTR	mx1.zoom.rio.br
170.81.42.251	A	ns1.zoom.rio.br