Robtex

Up: 192.31.86.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 192.31.87.0/25
Down right: 192.31.87.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.31.87.5	A	ares.harc.edu
192.31.87.6	A+PTR	demeter.harc.edu
192.31.87.6	PTR	files.harc.edu
192.31.87.6	PTR	images.harc.edu
192.31.87.7	A	ns2.harc.edu
192.31.87.13	A+PTR	apollo.harc.edu
192.31.87.13	A	airhoustontx.org
192.31.87.16	PTR	gbess.harc.edu
192.31.87.16	PTR	geo.harc.edu
192.31.87.16	PTR	geospatial.harc.edu
192.31.87.23	A+PTR	mapserver.harc.edu
192.31.87.24	A+PTR	test.harc.edu
192.31.87.24	A+PTR	trendstat.harc.edu
192.31.87.24	A	cswgcin.harc.edu
192.31.87.254	A	masses.harc.edu