Robtex

Up: 216.164.32.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 216.164.32.0/21
Down right: 216.164.40.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.164.33.1	PTR	bdl1.slvr-ubr1.lnh-slvr.md.cable.rcn.net
216.164.33.1	A+PTR	216-164-33-1.c3-0.snb-ubr1.chi-snb.il.cable.rcn.com
216.164.34.56	PTR	216-164-34-56.c3-0.snb-ubr1.chi-snb.il.cable.rcn.com
216.164.34.193	A+PTR	216-164-34-193.c3-0.snb-ubr1.chi-snb.il.cable.rcn.com
216.164.35.70	PTR	216-164-35-70.c3-0.snb-ubr1.chi-snb.il.cable.rcn.com
216.164.36.2	PTR	216-164-36-2.c3-0.snb-ubr1.chi-snb.il.cable.rcn.com
216.164.36.101	A+PTR	216-164-36-101.c3-0.snb-ubr1.chi-snb.il.cable.rcn.com
216.164.40.1	PTR	bdl1.ses-ubr1.lnh-ses.md.cable.rcn.net
216.164.40.1	A	bdl1.80w-ubr1.nyr-80w.ny.cable.rcn.net
216.164.44.3	PTR	main3.washpost.com
216.164.44.4	A+PTR	main4.washpost.com
216.164.44.6	A	main3.washpost.com
216.164.44.10	A	main10.washpost.com
216.164.44.30	A	inbound3.washpost.com
216.164.44.125	A	nwdns1.washpost.com
216.164.44.125	A	wd3.nw.wpni.net
216.164.45.11	A	w2k3web2.web.rcn.net
216.164.45.50	PTR	w2k3.web.rcn.net
216.164.45.50	A	www.accumetmaterials.com
216.164.45.50	A	apprimus.biz
216.164.45.51	PTR	fbsd.web.rcn.net
216.164.45.51	A	www.johnfranklinbardin.com
216.164.45.51	A	smartny.com
216.164.45.110	A+PTR	fbsdweb1.web.rcn.net
216.164.45.114	A+PTR	fbsdstats.web.rcn.net
216.164.45.115	A+PTR	fbsdmgmt.web.rcn.net
216.164.45.150	A+PTR	webtools.web.rcn.net
216.164.45.236	A+PTR	csc.rcn.com
216.164.45.236	A	nt-hosting.rcn.com
216.164.46.3	PTR	vl392.aggr3.lnh.md.rcn.net
216.164.46.4	A	appspot.com--www.0757js.net
216.164.46.4	A	pizzeriauno.com
216.164.46.21	A	smartny.com
216.164.46.21	A	smartcom.nyc
216.164.46.32	A	samgiammalvo.com
216.164.46.32	A	samscars.com
216.164.46.32	A	www.samscars.net
216.164.47.7	A	www.mandarintools.com
216.164.47.11	A	1pbs.net
216.164.47.14	A	csdr.org
216.164.47.14	A	www.csdr.org