Robtex

Up: 144.171.20.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 144.171.20.0/25
Down right: 144.171.20.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
144.171.20.6	A+PTR	nap.edu
144.171.20.6	A	www.nap.edu
144.171.20.7	A+PTR	download.nap.edu
144.171.20.12	A+PTR	darwin.nap.edu
144.171.20.12	A	bob.nap.edu
144.171.20.12	A	pompeii.nap.edu
144.171.20.15	A+PTR	ohm.nap.edu
144.171.20.16	A+PTR	boyle.nap.edu
144.171.20.20	A+PTR	crick.nap.edu
144.171.20.21	A+PTR	rontgen.nap.edu
144.171.20.22	A+PTR	curie.nap.edu
144.171.20.23	A	orsted.nap.edu
144.171.20.24	A	kepler.nap.edu
144.171.20.25	A+PTR	images.nap.edu
144.171.20.28	A+PTR	maxwell.nap.edu
144.171.20.29	A+PTR	fermi.nap.edu
144.171.20.30	A	iwaswondering.org
144.171.20.30	A	www.iwaswondering.com
144.171.20.30	A	iwaswondering.net
144.171.20.31	A	volta.nap.edu
144.171.20.32	A+PTR	print.nap.edu
144.171.20.33	A	media.nap.edu
144.171.20.34	A	alpini.nap.edu
144.171.20.35	A+PTR	vahl.nap.edu
144.171.20.40	A+PTR	newton.nap.edu
144.171.20.41	A+PTR	fermat.nap.edu
144.171.20.50	A+PTR	books.nap.edu
144.171.20.51	A	rs1.nap.edu
144.171.20.52	A	rs2.nap.edu
144.171.20.53	A	rs3.nap.edu
144.171.20.54	A+PTR	rs4.nap.edu
144.171.20.60	A	allegro.nap.edu
144.171.20.68	A	stats.nap.edu
144.171.20.88	A+PTR	kvm-vienna.nap.edu
144.171.20.90	A+PTR	rimini.nap.edu
144.171.20.222	A+PTR	notes.nap.edu
144.171.20.227	A+PTR	secure.nap.edu
144.171.20.228	A	cart.nap.edu
144.171.20.229	A	cashier.nap.edu
144.171.20.238	A+PTR	search.nap.edu