Robtex

Up: 199.87.80.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 199.87.80.0/22
Down right: 199.87.84.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
199.87.80.0	PTR	x.199.87.80.web-pass.com
199.87.80.2	PTR	x.199.87.80.web-pass.com
199.87.80.2	A	dhcp.6399christie.web-pass.com
199.87.80.10	PTR	x.199.87.80.web-pass.com
199.87.80.16	PTR	x.199.87.80.web-pass.com
199.87.80.24	PTR	x.199.87.80.web-pass.com
199.87.80.34	PTR	x.199.87.80.web-pass.com
199.87.80.35	PTR	x.199.87.80.web-pass.com
199.87.80.48	PTR	x.199.87.80.web-pass.com
199.87.80.56	PTR	x.199.87.80.web-pass.com
199.87.80.59	PTR	x.199.87.80.web-pass.com
199.87.80.66	PTR	x.199.87.80.web-pass.com
199.87.80.74	PTR	x.199.87.80.web-pass.com
199.87.80.89	PTR	x.199.87.80.web-pass.com
199.87.80.90	PTR	x.199.87.80.web-pass.com
199.87.80.91	PTR	x.199.87.80.web-pass.com
199.87.80.98	PTR	x.199.87.80.web-pass.com
199.87.80.106	PTR	x.199.87.80.web-pass.com
199.87.80.112	PTR	x.199.87.80.web-pass.com
199.87.80.120	PTR	x.199.87.80.web-pass.com
199.87.80.121	PTR	x.199.87.80.web-pass.com
199.87.80.122	PTR	x.199.87.80.web-pass.com
199.87.80.154	PTR	x.199.87.80.web-pass.com
199.87.80.168	PTR	x.199.87.80.web-pass.com
199.87.80.169	PTR	x.199.87.80.web-pass.com
199.87.80.170	PTR	x.199.87.80.web-pass.com
199.87.80.171	PTR	x.199.87.80.web-pass.com
199.87.80.190	A	dhcp.690pennsylvania.web-pass.com
199.87.80.202	PTR	x.199.87.80.web-pass.com
199.87.80.216	PTR	x.199.87.80.web-pass.com
199.87.80.218	PTR	x.199.87.80.web-pass.com
199.87.80.218	A	bellenger.org
199.87.80.218	A	donb.bellenger.org
199.87.80.224	PTR	x.199.87.80.web-pass.com
199.87.80.226	PTR	x.199.87.80.web-pass.com
199.87.80.226	A	dhcp.6466hollis.web-pass.com
199.87.80.232	PTR	x.199.87.80.web-pass.com
199.87.80.245	A	monitor2.web-pass.com
199.87.80.250	PTR	x.199.87.80.web-pass.com
199.87.81.130	PTR	x.199.87.81.web-pass.com
199.87.81.130	A	dhcp.83mcallister.web-pass.com
199.87.81.162	PTR	x.199.87.81.web-pass.com
199.87.81.162	A	dhcp.829folsom.web-pass.com
199.87.82.22	A	gohysf.com
199.87.82.38	A	dhcp46.301mission.web-pass.com
199.87.82.42	PTR	x.199.87.82.web-pass.com
199.87.82.42	A	laraelee.org
199.87.82.42	A	robertg.us
199.87.82.62	A	ns1.365main.web-pass.com
199.87.82.110	A	exchange.dfcn.com
199.87.82.145	PTR	x.199.87.82.web-pass.com
199.87.82.145	A	core.150se2nd.mi.web-pass.com
199.87.82.194	PTR	x.199.87.82.web-pass.com
199.87.83.1	PTR	x.199.87.80.web-pass.com
199.87.83.6	A	hinkman.org
199.87.83.16	PTR	x.199.87.80.web-pass.com
199.87.83.24	PTR	x.199.87.80.web-pass.com
199.87.83.30	A	dhcp.590sixth.web-pass.com
199.87.83.51	PTR	x.199.87.80.web-pass.com
199.87.83.58	PTR	x.199.87.80.web-pass.com
199.87.83.66	PTR	x.199.87.80.web-pass.com
199.87.83.67	PTR	x.199.87.80.web-pass.com
199.87.83.74	PTR	x.199.87.80.web-pass.com
199.87.83.80	PTR	x.199.87.80.web-pass.com
199.87.83.88	PTR	x.199.87.80.web-pass.com
199.87.83.89	PTR	x.199.87.80.web-pass.com
199.87.83.91	PTR	x.199.87.80.web-pass.com
199.87.83.97	PTR	x.199.87.80.web-pass.com
199.87.83.129	PTR	x.199.87.80.web-pass.com
199.87.83.131	PTR	x.199.87.80.web-pass.com
199.87.83.160	PTR	x.199.87.80.web-pass.com
199.87.83.170	PTR	x.199.87.80.web-pass.com
199.87.83.187	PTR	x.199.87.80.web-pass.com
199.87.83.194	PTR	x.199.87.80.web-pass.com
199.87.83.194	A	dhcp.55page.web-pass.com
199.87.83.200	PTR	x.199.87.80.web-pass.com
199.87.83.201	PTR	x.199.87.80.web-pass.com
199.87.83.203	PTR	x.199.87.80.web-pass.com
199.87.83.209	PTR	x.199.87.80.web-pass.com
199.87.83.225	PTR	x.199.87.80.web-pass.com
199.87.83.226	PTR	x.199.87.80.web-pass.com
199.87.83.226	A	dhcp.330berry.web-pass.com
199.87.83.232	PTR	x.199.87.80.web-pass.com
199.87.83.241	PTR	x.199.87.80.web-pass.com
199.87.84.6	A	dc-017dc2c0.chimnet.com
199.87.84.12	A	dc-017dc2c0.chimnet.com
199.87.84.34	PTR	x.199.87.84.web-pass.com
199.87.84.34	A	dhcp.2633telegraph.web-pass.com
199.87.84.130	PTR	x.199.87.84.web-pass.com
199.87.84.130	A	dhcp.1595pacific.web-pass.com
199.87.84.210	A	smtp.extractable.com
199.87.84.222	A	mail.carolhwilliams.com
199.87.84.238	A	thrixtie.com
199.87.84.254	A	dhcp46.1624franklin.web-pass.com
199.87.85.61	A	dhcp.950harrison.web-pass.com
199.87.85.70	A	mail.msasf.com
199.87.85.70	A	mx2.msasf.com
199.87.85.190	A	dhcp.38harriet.web-pass.com
199.87.85.194	PTR	x.199.87.85.web-pass.com
199.87.85.194	A	dhcp.1801shattuck.web-pass.com
199.87.85.240	PTR	x.199.87.85.web-pass.com
199.87.85.240	A	aanate.com
199.87.85.248	PTR	x.199.87.85.web-pass.com
199.87.85.248	A	nathankonopinski.com
199.87.86.91	PTR	x.199.87.86.web-pass.com
199.87.86.203	PTR	x.199.87.86.web-pass.com
199.87.86.203	A	lairden.com
199.87.86.230	A	nolanpro.com
199.87.87.30	A	dhcp.350alabama.web-pass.com
199.87.87.94	A	dhcp.101crescent.web-pass.com
199.87.87.98	PTR	x.199.87.87.web-pass.com
199.87.87.98	A	dhcp.200second.web-pass.com
199.87.87.242	PTR	x.199.87.87.web-pass.com
199.87.87.242	A	mail.agile3partners.com