Robtex

Up: 64.52.64.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 64.52.64.0/21
Down right: 64.52.72.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.52.64.128	PTR	x40344080.ip.e-nt.net
64.52.64.144	PTR	x40344090.ip.e-nt.net
64.52.64.176	PTR	x403440b0.ip.e-nt.net
64.52.64.177	PTR	mail.brera.com
64.52.64.220	A	owa.cccalypso.com
64.52.64.220	A	mail.cccalypso.com
64.52.64.237	A	x403440ed.ip.e-nt.net
64.52.65.2	A	smtp.curtispartition.com
64.52.65.18	PTR	foodmatch.com
64.52.65.18	PTR	mail.foodmatch.com
64.52.65.51	A	smtp.its-ship.com
64.52.65.59	A	imsqos.com
64.52.65.241	PTR	mail.metarhythm.com
64.52.66.17	PTR	keryx.com
64.52.66.18	PTR	keryx.com
64.52.66.19	PTR	keryx.com
64.52.67.78	A	mail2.amorusolaw.com
64.52.68.43	A	tribe13nyc.com
64.52.68.43	A	mail.tribe13nyc.com
64.52.68.122	A	mail2.pantheoncompanies.com
64.52.68.122	A	mail2.pantheonproperties.com
64.52.68.162	PTR	x403444a2.ip.e-nt.net
64.52.68.162	A	lrgwomens.com
64.52.68.162	A	buyluxirie.com
64.52.68.180	A	mail1.qplus-usa.com
64.52.68.180	A	assp.buyluxirie.com
64.52.68.180	A	assp.lrgwomens.com
64.52.69.2	PTR	commserver.mitchellmartin.com
64.52.69.2	A	commserver.op-it.com
64.52.69.51	PTR	x40344533.ip.e-nt.net
64.52.69.130	PTR	x40344582.ip.e-nt.net
64.52.69.160	PTR	x403445a0.ip.e-nt.net
64.52.69.208	PTR	x403445d0.ip.e-nt.net
64.52.71.2	PTR	email.ariscapital.com
64.52.72.124	A	x4034487c.ip.e-nt.net
64.52.72.160	PTR	x403448a0.ip.e-nt.net
64.52.72.188	A	x403448bc.ip.e-nt.net
64.52.72.195	PTR	mail.queenscp.org
64.52.73.20	PTR	mail.transperfect.com
64.52.73.96	A+PTR	room.tdc-corp.com
64.52.73.98	PTR	tron.tdc-corp.net
64.52.73.98	A	mail.conveysoftware.com
64.52.73.135	A	mail.as-coa.org
64.52.73.178	A	mail.2164.net
64.52.73.179	PTR	filter1.acbp.net
64.52.73.179	A	filter1.2164.net
64.52.73.179	A	filter1.rebooters.net
64.52.74.27	A	nyhtc.us
64.52.74.141	A	mail.jacobsiegel.com
64.52.74.141	A	jacobsiegel.com
64.52.74.161	PTR	x40344aa1.ip.e-nt.net
64.52.79.99	A	max1.nyc.ggn.net