Robtex

Up: 204.57.0.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 204.57.0.0/22
Down right: 204.57.4.0/22

IP	Type	Hostname
204.57.0.1	A+PTR	catarina.usc.edu
204.57.0.1	A	netweb.usc.edu
204.57.0.1	A	netlab.usc.edu
204.57.0.2	A	rumi.usc.edu
204.57.0.8	A+PTR	garvey.usc.edu
204.57.0.9	A+PTR	garfield.usc.edu
204.57.0.10	A	alhambra.usc.edu
204.57.0.11	A	pasadena.usc.edu
204.57.0.16	A+PTR	marina.usc.edu
204.57.0.18	A	delrey.usc.edu
204.57.0.20	A	venice.usc.edu
204.57.0.21	A+PTR	verdi.usc.edu
204.57.0.24	A	vista.usc.edu
204.57.0.25	A+PTR	hollywood.usc.edu
204.57.0.27	A+PTR	redwood.usc.edu
204.57.0.28	A	kost.usc.edu
204.57.0.32	A	donapaula.usc.edu
204.57.0.33	PTR	colva.usc.edu
204.57.0.33	A	enl.usc.edu
204.57.0.50	A	guangzhou.usc.edu
204.57.0.51	A	shengzhen.usc.edu
204.57.0.52	A+PTR	shanghai.usc.edu
204.57.0.54	A+PTR	beida.usc.edu
204.57.0.56	A	nanjin.usc.edu
204.57.0.57	A+PTR	haidian.usc.edu
204.57.0.58	A	bj2008.usc.edu
204.57.0.60	A+PTR	greatwall.usc.edu
204.57.0.66	A	blueridge.usc.edu
204.57.0.68	A	longwood.usc.edu
204.57.0.80	A+PTR	richmond.usc.edu
204.57.0.82	A+PTR	carolina.usc.edu
204.57.0.86	A	rtp.usc.edu
204.57.0.88	A+PTR	manhattan.usc.edu
204.57.0.90	A+PTR	canyon.usc.edu
204.57.0.95	A+PTR	valley.usc.edu
204.57.0.96	A+PTR	orchid.usc.edu
204.57.0.97	A+PTR	sea.usc.edu
204.57.0.98	A+PTR	newhorizon.usc.edu
204.57.0.99	A	continent.usc.edu
204.57.0.129	A+PTR	sim19.usc.edu
204.57.0.150	A	sim.usc.edu
204.57.0.151	A+PTR	sim1.usc.edu
204.57.0.152	A+PTR	sim2.usc.edu
204.57.0.153	A+PTR	sim3.usc.edu
204.57.0.154	A+PTR	sim4.usc.edu
204.57.0.155	A+PTR	sim5.usc.edu
204.57.0.246	A	visa-gw7.usc.edu
204.57.0.247	A+PTR	visa-gw6.usc.edu
204.57.0.248	A	visa-gw5.usc.edu
204.57.0.249	A+PTR	visa-gw4.usc.edu
204.57.0.250	A	visa-gw3.usc.edu
204.57.0.251	A	visa-gw2.usc.edu
204.57.0.254	A	netlab-gw.usc.edu
204.57.1.4	A	excalibur.usc.edu
204.57.2.2	A+PTR	peering-ns.usc.edu
204.57.2.3	A	peering.usc.edu
204.57.2.13	A+PTR	peering-ns2.usc.edu
204.57.3.1	A	fbsd1.usc.edu
204.57.3.2	A	fbsd2.usc.edu
204.57.3.3	A+PTR	fbsd3.usc.edu
204.57.3.4	A+PTR	fbsd4.usc.edu
204.57.3.8	A+PTR	fbsd8.usc.edu
204.57.3.9	A	fbsd9.usc.edu
204.57.3.10	A+PTR	fbsd10.usc.edu
204.57.3.11	A+PTR	fbsd11.usc.edu
204.57.3.16	A	fbsd16.usc.edu
204.57.3.17	A+PTR	fbsd17.usc.edu
204.57.3.18	A+PTR	fbsd18.usc.edu
204.57.3.19	A	fbsd19.usc.edu
204.57.3.24	A	fbsd24.usc.edu
204.57.3.25	A	fbsd25.usc.edu
204.57.3.61	A+PTR	digi.usc.edu
204.57.3.62	A+PTR	davinci-1.usc.edu
204.57.3.225	A	netlab5-gw.usc.edu
204.57.3.234	A+PTR	netlab-gw.usc.edu