Robtex

Up: 80.64.136.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 80.64.140.0/23
Down right: 80.64.142.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
80.64.140.0	PTR	network.vienna.at.mos.at
80.64.140.2	PTR	cthon.mos.at
80.64.140.4	PTR	www.mos.at
80.64.140.5	PTR	briefkasten.mos.at
80.64.140.6	PTR	custwww.mos.at
80.64.140.15	PTR	d0mini0n.net
80.64.140.23	PTR	cthulhu.mos.at
80.64.140.24	PTR	natan.mos.at
80.64.140.68	A	mail.sms-siemag.at
80.64.140.70	A	smtp.sms-siemag.at
80.64.140.85	PTR	80.64.140.85.net.netplanet.at
80.64.140.85	A	gollum.at
80.64.140.85	A	mail.gollum.at
80.64.140.160	PTR	80.64.140.160.net.netplanet.at
80.64.140.162	PTR	80.64.140.162.net.netplanet.at
80.64.140.162	A	mail.slc.at
80.64.141.17	PTR	80.64.141.17.net.netplanet.at
80.64.141.34	A+PTR	mx.dsb.at
80.64.141.98	PTR	80.64.141.98.net.netplanet.at
80.64.141.98	A	mailgate.frey.co.at
80.64.141.113	PTR	80.64.141.113.net.netplanet.at
80.64.141.131	PTR	80.64.141.131.net.netplanet.at
80.64.141.131	A	mail.att.co.at
80.64.141.243	PTR	80.64.141.243.net.netplanet.at
80.64.141.243	A	mail.kess.at
80.64.141.244	PTR	80.64.141.244.net.netplanet.at
80.64.141.244	A	gw.kess.at
80.64.141.244	A	roseelectronics.at
80.64.141.255	PTR	80.64.141.255.net.netplanet.at
80.64.142.0	PTR	80.64.142.0.net.netplanet.at
80.64.142.210	A	mail.becskei.at
80.64.142.230	A+PTR	mail.iso-car.com
80.64.142.247	PTR	80.64.142.247.net.netplanet.at
80.64.143.0	PTR	80.64.143.0.net.netplanet.at
80.64.143.4	A	art-rogyundrogy.com
80.64.143.64	PTR	80.64.143.64.net.netplanet.at
80.64.143.64	A	mail.coolcard.at
80.64.143.64	A	mail.kratky-group.com
80.64.143.68	PTR	80.64.143.68.net.netplanet.at
80.64.143.84	A+PTR	mail.silverweb.at
80.64.143.84	A	mail.chocobio.com
80.64.143.84	A	mail.cappuccino.at
80.64.143.120	A+PTR	remote.ruiner.at
80.64.143.120	A	mail.ruiner.at
80.64.143.126	PTR	80.64.143.126.net.netplanet.at
80.64.143.126	A	united-shop.com
80.64.143.126	A	zoo-exklusiv.at
80.64.143.131	PTR	80.64.143.131.net.netplanet.at
80.64.143.131	A	mail.gw-stubenberg.at
80.64.143.131	A	mail.gw-gamlitz.at
80.64.143.139	A	remote.bewaesserungsanlagen.at
80.64.143.139	A	remote2.bewaesserungsanlagen.at
80.64.143.160	A	edv-pinetz.at
80.64.143.185	A	mail.hajek-risk.com
80.64.143.185	A	mail2.hajek-risk.com
80.64.143.186	A	dasch-sandstrahlen.at
80.64.143.186	A	oefen-flicker.at
80.64.143.189	PTR	80.64.143.189.net.netplanet.at
80.64.143.189	A	mail.kittenberger.at
80.64.143.236	PTR	80.64.143.236.net.netplanet.at
80.64.143.236	A	mail.fssblangenlois.ac.at