Robtex

Up: 139.4.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 139.4.0.0/18
Down right: 139.4.64.0/18

IP	Type	Hostname
139.4.2.69	PTR	loopback0.dr2.ber2.alter.net
139.4.3.181	A	gw1.dus2.alter.net
139.4.3.217	A	gw2.dus2.alter.net
139.4.6.89	PTR	loopback0.dr2.fft4.alter.net
139.4.6.105	A+PTR	fft4eusoesr2.fft.ops.eu.uu.net
139.4.22.38	A+PTR	fastethernet4-0.vr1.dtm3.alter.net
139.4.26.89	A	schurin_01udk-ude200448.viper.alter.net
139.4.28.57	A	novonor01ube-ude00147.viper.alter.net
139.4.28.233	A	maxonin01ube-ude02076.viper.alter.net
139.4.32.2	PTR	weiss-druck-transit.dresden2.de.alter.net
139.4.34.8	PTR	bgs-549-transit.hamburg3.de.alter.net
139.4.42.50	A	thehcssblog.com
139.4.42.50	A	outbound.philips.de
139.4.42.193	A	wackerc01wus-ude02049.viper.alter.net
139.4.43.132	PTR	artofnet-transit.de.alter.net
139.4.43.134	PTR	artofnet.bremen.de.alter.net
139.4.49.4	PTR	ude201744-transit.gw5.fft3.alter.net
139.4.49.6	PTR	ude201744.gw5.fft3.alter.net
139.4.49.129	PTR	bgs-363-koblenz-backup.bonn.de.alter.net
139.4.49.132	PTR	bgs-364-saarbruecken-transit.saarbruecken2.de.alter.net
139.4.49.134	PTR	bgs-364-saarbruecken.saarbruecken2.de.alter.net
139.4.51.129	PTR	osnabrueck.de.alter.net
139.4.51.130	PTR	charlottenburg-klinik-2.osnabrueck.de.alter.net
139.4.52.156	PTR	hoermann-1-transit.kassel.de.alter.net
139.4.54.173	PTR	cologne2.de.alter.net
139.4.57.9	PTR	gigabitethernet4-2-203.gw5.hdn1.alter.net
139.4.57.12	PTR	viewsonic-transit.duesseldorf2.de.alter.net
139.4.58.17	A	silve--01wgr-ude200012.viper.alter.net
139.4.64.122	A	vzb-management-2.dtm1.de.alter.net
139.4.64.169	A+PTR	osborn-01wus-ude02028.viper.alter.net
139.4.65.13	PTR	frankfurt.de.alter.net
139.4.66.149	PTR	bielefeld2.de.alter.net
139.4.69.5	PTR	duesseldorf.de.alter.net
139.4.75.89	PTR	lmc-backup.muenster.de.alter.net
139.4.76.5	PTR	frankfurt2.de.alter.net
139.4.76.6	PTR	linkslaters.frankfurt22.de.alter.net
139.4.78.8	PTR	dis-00055-backup-transit.schwerin.de.alter.net
139.4.79.1	PTR	landshut.de.alter.net
139.4.79.4	PTR	rand-backup-transit.aalen.de.alter.net
139.4.79.138	PTR	raaco.luebeck.de.alter.net
139.4.79.140	PTR	sc-romtelecom-transit.frankfurt3.alter.net
139.4.81.1	PTR	frankfurt4.de.alter.net
139.4.88.5	PTR	fastethernet3-1-0.gw4.ess2.alter.net
139.4.88.173	PTR	serial11-0-0.gw1.muc2.alter.net
139.4.88.174	PTR	ude201971.de.customer.alter.net
139.4.93.126	A	novonor01ube-ude00147.viper.alter.net
139.4.101.2	PTR	br01.frankfurt.rdsnet.ro
139.4.108.196	PTR	rwl-transit.dortmund2.de.alter.net
139.4.108.197	PTR	dortmund2.de.alter.net
139.4.110.1	PTR	cr.osb1.alter.net