Robtex

Up: 64.154.88.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 64.154.88.0/23
Down right: 64.154.90.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.154.88.1	PTR	dns1.printable.com
64.154.88.2	PTR	dns2.printable.com
64.154.88.30	PTR	images.printable.com
64.154.88.35	PTR	manager.printable.com
64.154.88.36	PTR	sdmgr01.printable.com
64.154.88.70	A	ptiservers.net
64.154.88.80	A	mail.digimex.com
64.154.88.121	PTR	members.printable.com
64.154.88.121	A	aetnacommunicationskits.com
64.154.88.121	A	offmydesk.com
64.154.88.126	PTR	sdsvc01.printable.com
64.154.88.215	PTR	sdcwb01.printable.com
64.154.88.215	A	fpexpression.com
64.154.89.60	A	tentandtablespecials.com
64.154.89.60	A	tableandtentspecials.com
64.154.89.60	A	www.cgacomm11.com
64.154.89.98	A	mx2.printable.com