Robtex

Up: 216.230.64.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 216.230.64.0/25
Down right: 216.230.64.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.230.64.2	A+PTR	obedient.cypresscom.net
216.230.64.3	A+PTR	athena.cypresscom.net
216.230.64.3	A	mail.netfinancials.net
216.230.64.4	PTR	216.230.64.4
216.230.64.4	A	redcross.cypresscom.net
216.230.64.4	A	firesteed.org
216.230.64.5	PTR	5.64.230.216.in-addr.arpa
216.230.64.5	A	smtp2.cypresscom.net
216.230.64.5	A	smtp.cypresscom.net
216.230.64.6	A+PTR	smtp3.cypresscom.net
216.230.64.6	A	smtp.cypresscom.net
216.230.64.8	PTR	shawshank.cypresscom.net
216.230.64.8	A	taylorblessey.net
216.230.64.9	PTR	216.230.64.9
216.230.64.9	A	netfinancials.net
216.230.64.9	A	jcschultzinteriors.com
216.230.64.10	PTR	216.230.64.10
216.230.64.10	A	mail.jwaller.com
216.230.64.10	A	mail.kwaller.com
216.230.64.11	A+PTR	ares.cypresscom.net
216.230.64.12	PTR	12.64.230.216.in-addr.arpa
216.230.64.14	A+PTR	lifeboat.cypresscom.net
216.230.64.34	PTR	34.64.230.216.in-addr.arpa
216.230.64.34	A	voodoo.cypresscom.net
216.230.64.34	A	voodoo2.cypresscom.net
216.230.64.82	A	atl-ces1-3475piedmontrd.cypresscom.net
216.230.64.93	PTR	216-230-64-93.client.cypresscom.net
216.230.64.116	A	mail.delivery-specialists.com
216.230.64.116	A	delivery-specialists.com
216.230.64.159	PTR	216-230-64-159.client.cypresscom.net
216.230.64.160	PTR	216-230-64-160.client.cypresscom.net
216.230.64.191	PTR	216-230-64-191.client.cypresscom.net
216.230.64.219	PTR	216-230-64-219.client.cypresscom.net
216.230.64.255	PTR	216-230-64-255.client.cypresscom.net