Robtex

Up: 216.235.208.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 216.235.208.0/22
Down right: 216.235.212.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.235.208.0	PTR	216-235-208-0.fwd.datafoundry.com
216.235.208.2	PTR	mail.ursi.com
216.235.208.2	A	mx2.finrx.net
216.235.208.2	A	mx1.finrx.com
216.235.208.30	A	unitedrecoverysystems.com
216.235.208.30	A	www.unitedrecoverysystems.com
216.235.208.30	A	www.ursi.com
216.235.208.53	A	mail.urs-lp.com
216.235.209.10	A+PTR	ns1.ursi.com
216.235.209.11	A+PTR	ns2.ursi.com
216.235.209.19	PTR	216-235-209-19.fwd.datafoundry.com
216.235.209.178	PTR	216-235-209-178.fwd.datafoundry.com
216.235.209.194	PTR	216-235-209-194.fwd.datafoundry.com
216.235.210.35	PTR	216-235-210-35.fwd.datafoundry.com
216.235.210.88	PTR	216-235-210-88.fwd.datafoundry.com
216.235.210.90	PTR	216-235-210-90.fwd.datafoundry.com
216.235.213.41	PTR	216-235-213-41.fwd.datafoundry.com
216.235.213.210	PTR	216-235-213-210.fwd.datafoundry.com
216.235.214.153	PTR	216-235-214-153.fwd.datafoundry.com