Robtex

Up: 72.255.0.0/17
Can't show all results, try to descend to a more specific CIDR
Down left: 72.255.64.0/19
Down right: 72.255.96.0/19
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.255.65.155	PTR	72-255-65-155.client.mchsi.com
72.255.65.155	A	rtconnect.kineticedgept.com
72.255.66.162	PTR	72-255-66-162.client.mchsi.com
72.255.66.165	PTR	72-255-66-165.client.mchsi.com
72.255.68.130	PTR	72-255-68-130.client.mchsi.com
72.255.69.178	PTR	hrgvs.com
72.255.69.178	A	www.hrgvs.com
72.255.69.178	A	www.grapevinestaffing.com
72.255.69.182	PTR	thundercloudz.com
72.255.69.182	A	www.thundercloudz.com
72.255.69.182	A	jessefrey.com
72.255.71.99	A	itsnlmc.connecttowork.net
72.255.72.91	PTR	cbcowebserver.cbco.org
72.255.72.91	A	www.cbco.org
72.255.74.7	PTR	72-255-74-7.client.mchsi.com
72.255.74.7	A	ftp.nevada.k12.ia.us
72.255.74.34	A+PTR	email.flanaganlawgroup.com
72.255.74.42	PTR	fullmetalunix.com
72.255.74.42	A	mail.echelontechnical.com
72.255.74.42	A	ns1.fullmetalunix.com
72.255.80.50	PTR	72-255-80-50.client.mchsi.com
72.255.80.50	A	dns.sdy.org
72.255.80.50	A	glamcam.com
72.255.80.72	A	72-255-80-72.client.stsn.net
72.255.89.154	PTR	72-255-89-154.client.mchsi.com
72.255.91.19	PTR	72-255-91-19.client.mchsi.com
72.255.91.19	A	onex-sci-iowa.com
72.255.91.19	A	onssi-sci-iowa.com
72.255.97.142	PTR	72-255-97-142.client.mchsi.com
72.255.97.142	A	nucaraltcnorth.com
72.255.103.1	PTR	72-255-103-1.client.mchsi.com
72.255.103.3	PTR	72-255-103-3.client.mchsi.com
72.255.103.64	PTR	72-255-103-64.client.stsn.net
72.255.103.66	PTR	72-255-103-66.client.stsn.net
72.255.103.129	PTR	72-255-103-129.client.mchsi.com
72.255.103.130	PTR	72-255-103-130.client.stsn.net
72.255.103.194	PTR	72-255-103-194.client.mchsi.com
72.255.107.18	PTR	72-255-107-18.client.mchsi.com
72.255.107.18	A	keycooperativeclothing.com
72.255.108.0	PTR	72-255-108-0.client.stsn.net
72.255.108.67	PTR	72-255-108-67.client.stsn.net
72.255.108.129	PTR	72-255-108-129.client.mchsi.com
72.255.108.192	PTR	72-255-108-192.client.mchsi.com
72.255.108.195	PTR	72-255-108-195.client.stsn.net
72.255.113.222	PTR	72-255-113-222.client.mchsi.com
72.255.113.222	A	transiowa.dyndns.org
72.255.114.106	PTR	72-255-114-106.client.mchsi.com
72.255.117.0	PTR	72-255-117-0.client.mchsi.com
72.255.117.3	PTR	72-255-117-3.client.mchsi.com
72.255.117.66	PTR	72-255-117-66.client.stsn.net
72.255.117.128	PTR	72-255-117-128.client.mchsi.com
72.255.117.156	A	cyberselfstudy.com
72.255.117.194	PTR	72-255-117-194.client.mchsi.com
72.255.117.195	PTR	72-255-117-195.client.mchsi.com
72.255.118.2	A	dmpspublicschools.com
72.255.118.2	A	dmps.k12.ia.us
72.255.118.2	A	dmpublicschools.com
72.255.119.66	A	dmpspublicschools.com
72.255.119.66	A	dmps.k12.ia.us
72.255.119.66	A	dmpublicschools.com
72.255.119.69	PTR	72-255-119-69.client.mchsi.com
72.255.119.69	A	www.dmps.k12.ia.us
72.255.119.77	A	dmps.k12.ia.us
72.255.120.0	PTR	72-255-120-0.client.mchsi.com
72.255.120.2	PTR	72-255-120-2.client.stsn.net
72.255.120.64	PTR	72-255-120-64.client.stsn.net
72.255.120.65	PTR	72-255-120-65.client.mchsi.com
72.255.120.66	PTR	72-255-120-66.client.mchsi.com
72.255.120.182	A	imap.mwhts.com
72.255.120.182	A	mwhts.com
72.255.120.182	A	smtp.mwhts.com
72.255.127.138	PTR	72-255-127-138.client.mchsi.com
72.255.127.138	A	mail.bookrak.com