Robtex

Up: 143.166.192.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 143.166.200.0/22
Down right: 143.166.204.0/22

IP	Type	Hostname
143.166.200.1	PTR	nmm-fddi.us.dell.com
143.166.200.12	PTR	ausivbdatarr3.us.dell.com
143.166.200.13	PTR	ausivbdialrr3.us.dell.com
143.166.200.17	PTR	25edu.us.dell.com
143.166.200.19	PTR	ausivbprntrr3.us.dell.com
143.166.200.25	PTR	jovalenzuela.us.dell.com
143.166.201.1	PTR	rr37k1-e0.us.dell.com
143.166.201.9	PTR	9yth6.us.dell.com
143.166.201.11	PTR	vlinc-rr2-rvi.us.dell.com
143.166.201.13	PTR	rr3opc.us.dell.com
143.166.201.14	PTR	geodllptarr3.us.dell.com
143.166.201.25	PTR	shamu.us.dell.com
143.166.201.26	PTR	24yz7.us.dell.com
143.166.201.254	PTR	darth.us.dell.com
143.166.204.22	PTR	asg-ics.us.dell.com
143.166.204.24	PTR	goliath.us.dell.com
143.166.204.30	PTR	wn7-89jwnd1.aus.amer.dell.com
143.166.204.40	PTR	wn7x64-hsz2xp1.aus.amer.dell.com
143.166.204.50	PTR	ebc_room6_pc1.us.dell.com
143.166.204.56	PTR	wxp-2c710l1.aus.amer.dell.com
143.166.204.59	PTR	wn7-1s7czk1.aus.amer.dell.com
143.166.204.65	PTR	wn7x64-2qmlds1.aus.amer.dell.com
143.166.204.72	PTR	wn7-6w4h1q1.aus.amer.dell.com
143.166.204.74	PTR	wn7x64-9lljds1.aus.amer.dell.com
143.166.204.82	PTR	wn7x64-d1scds1.aus.amer.dell.com
143.166.204.85	PTR	wxp-cd7nks1.aus.amer.dell.com