Robtex

Up: 216.163.0.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 216.163.0.0/21
Down right: 216.163.8.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.163.0.2	A+PTR	216-163-0-2.ritternet.com
216.163.0.8	A	216-163-0-8.ritternet.com
216.163.0.61	A	216-163-0-61.ritternet.com
216.163.0.70	A	216-163-0-70.ritternet.com
216.163.0.89	A	216-163-0-89.ritternet.com
216.163.0.250	A	216-163-0-250.ritternet.com
216.163.1.1	PTR	216-163-1-1.ritternet.com
216.163.1.52	A	aoexodus.com
216.163.1.209	PTR	216-163-1-209.ritternet.com
216.163.1.209	A	alcwoodcraft.com
216.163.2.1	PTR	216-163-2-1.ritternet.com
216.163.5.1	PTR	216-163-5-1.ritternet.com
216.163.5.4	PTR	216-163-5-4.ritternet.com
216.163.5.19	PTR	216-163-5-19.ritternet.com
216.163.6.18	PTR	216-163-6-18.ritternet.com
216.163.6.18	A	theslayerwithin.com
216.163.7.3	PTR	cameronconstructionco.com
216.163.7.3	PTR	cameronconstructionco.net
216.163.7.3	PTR	cameronconstructionco.org
216.163.7.35	PTR	portal.remoteemr.com
216.163.7.35	A	www.remoteemr.com
216.163.7.36	A+PTR	mail.remoteemr.com
216.163.7.36	PTR	smtp.remoteemr.com
216.163.7.36	A+PTR	webmail.remoteemr.com
216.163.7.58	A+PTR	mail.tecelectric.com
216.163.7.66	PTR	magictouchcorp.com
216.163.7.66	A	mail.magictouchcorp.com
216.163.7.114	PTR	kmsmail.kalmersolutions.com
216.163.7.138	A	*.jonesboro.org
216.163.7.139	A	daretobebad.com
216.163.7.174	PTR	iserver.wlpmm-firm.com
216.163.7.174	A	mail.wlpmm-firm.com
216.163.8.1	PTR	216-163-8-1.ritternet.com
216.163.8.161	PTR	216-163-8-161.ritternet.com
216.163.10.9	A	buildjonesboro.com
216.163.10.9	A	keithingram.com
216.163.10.94	A	mail.millarbell.com
216.163.11.35	PTR	216-163-11-35.ritternet.com
216.163.12.75	PTR	216-163-12-75.ritternet.com
216.163.13.3	PTR	216-163-13-3.ritternet.com