Robtex

Up: 72.23.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 72.23.0.0/20
Down right: 72.23.16.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.23.1.1	A+PTR	dynamic-acs-72-23-1-1.zoominternet.net
72.23.1.57	A	dynamic-acs-72-23-1-57.zoominternet.net
72.23.1.139	A	dynamic-acs-72-23-1-139.zoominternet.net
72.23.1.143	A	dynamic-acs-72-23-1-143.zoominternet.net
72.23.2.1	A	dynamic-acs-72-23-2-1.zoominternet.net
72.23.2.2	PTR	static-acs-72-23-2-2.zoominternet.net
72.23.2.2	A	dynamic-acs-72-23-2-2.zoominternet.net
72.23.2.3	A	dynamic-acs-72-23-2-3.zoominternet.net
72.23.2.4	A+PTR	dynamic-acs-72-23-2-4.zoominternet.net
72.23.2.32	PTR	static-acs-72-23-2-32.zoominternet.net
72.23.2.32	A	dynamic-acs-72-23-2-32.zoominternet.net
72.23.2.33	A	dynamic-acs-72-23-2-33.zoominternet.net
72.23.2.34	A	dynamic-acs-72-23-2-34.zoominternet.net
72.23.2.35	PTR	static-acs-72-23-2-35.zoominternet.net
72.23.2.35	A	dynamic-acs-72-23-2-35.zoominternet.net
72.23.2.64	A	dynamic-acs-72-23-2-64.zoominternet.net
72.23.2.65	A	dynamic-acs-72-23-2-65.zoominternet.net
72.23.2.66	A	dynamic-acs-72-23-2-66.zoominternet.net
72.23.2.67	A	dynamic-acs-72-23-2-67.zoominternet.net
72.23.2.96	A	dynamic-acs-72-23-2-96.zoominternet.net
72.23.2.97	A	dynamic-acs-72-23-2-97.zoominternet.net
72.23.2.98	A	dynamic-acs-72-23-2-98.zoominternet.net
72.23.2.99	A	dynamic-acs-72-23-2-99.zoominternet.net
72.23.2.128	A	dynamic-acs-72-23-2-128.zoominternet.net
72.23.2.129	PTR	btdc-cml1k-007.dev.zoominternet.net
72.23.2.129	A	dynamic-acs-72-23-2-129.zoominternet.net
72.23.2.130	A	dynamic-acs-72-23-2-130.zoominternet.net
72.23.2.131	A	dynamic-acs-72-23-2-131.zoominternet.net
72.23.2.160	A	dynamic-acs-72-23-2-160.zoominternet.net
72.23.2.161	A	dynamic-acs-72-23-2-161.zoominternet.net
72.23.2.162	A	dynamic-acs-72-23-2-162.zoominternet.net
72.23.2.163	A	dynamic-acs-72-23-2-163.zoominternet.net
72.23.2.192	A	dynamic-acs-72-23-2-192.zoominternet.net
72.23.2.193	A	dynamic-acs-72-23-2-193.zoominternet.net
72.23.2.194	A	dynamic-acs-72-23-2-194.zoominternet.net
72.23.2.195	A	dynamic-acs-72-23-2-195.zoominternet.net
72.23.2.224	A	dynamic-acs-72-23-2-224.zoominternet.net
72.23.2.225	A	dynamic-acs-72-23-2-225.zoominternet.net
72.23.2.226	A	dynamic-acs-72-23-2-226.zoominternet.net
72.23.2.227	A	dynamic-acs-72-23-2-227.zoominternet.net
72.23.3.2	PTR	static-acs-72-23-3-2.zoominternet.net
72.23.4.131	A	ops-fw131.zoominternet.net
72.23.4.145	A	noc.zoominternet.net
72.23.4.145	A	techtools-rh.zoominternet.net
72.23.4.145	A	techtools-1.zoominternet.net
72.23.5.160	PTR	dynamic-acs-72-23-5-160.zoominternet.net
72.23.5.227	A+PTR	dynamic-acs-72-23-5-227.zoominternet.net
72.23.5.227	A	ebill.northwesternrec.com
72.23.5.228	A	mail.northwesternrec.com
72.23.5.243	A	mail.valleyoffice.com
72.23.7.2	A+PTR	btdc-c6509-001.dev.zoominternet.net
72.23.7.181	A	bdcf-c3400-001.dev.zoominternet.net
72.23.7.181	A	dynamic-acs-72-23-7-181.zoominternet.net
72.23.9.2	A+PTR	dynamic-acs-72-23-9-2.zoominternet.net
72.23.9.37	A	dynamic-acs-72-23-9-37.zoominternet.net
72.23.9.97	A+PTR	dynamic-acs-72-23-9-97.zoominternet.net
72.23.9.191	A	dynamic-acs-72-23-9-191.zoominternet.net
72.23.10.190	A	occ-0-353-1001.1.nflxso.net
72.23.10.190	A	occ-2-353-2430.1.nflxso.net
72.23.10.190	A	occ-1-353-1722.1.nflxso.net
72.23.10.194	PTR	dynamic-acs-72-23-10-194.zoominternet.net
72.23.10.194	A	occ-0-353-1001.1.nflxso.net
72.23.10.194	A	occ-2-353-2430.1.nflxso.net
72.23.10.198	A	occ-0-353-1001.1.nflxso.net
72.23.10.198	A	occ-2-353-2430.1.nflxso.net
72.23.10.198	A	occ-1-353-1722.1.nflxso.net
72.23.11.2	A+PTR	dynamic-acs-72-23-11-2.zoominternet.net
72.23.12.2	A+PTR	dynamic-acs-72-23-12-2.zoominternet.net
72.23.12.71	A	dynamic-acs-72-23-12-71.zoominternet.net
72.23.13.29	A	dynamic-acs-72-23-13-29.zoominternet.net
72.23.14.20	A	mx-9.zoominternet.net
72.23.14.21	A	mxhost-3.zoominternet.net
72.23.14.22	A	mx-11.zoominternet.net
72.23.14.23	A	mx-10.zoominternet.net
72.23.15.33	PTR	static-acs-72-23-15-33.zoominternet.net
72.23.15.115	A	taxdiscovery.net
72.23.15.163	A	dynamic-acs-72-23-15-163.zoominternet.net
72.23.16.2	A	clco-c4948-001.dev.zoominternet.net
72.23.16.206	A	dynamic-acs-72-23-16-206.zoominternet.net
72.23.16.212	A	dynamic-acs-72-23-16-212.zoominternet.net
72.23.17.14	A	dynamic-acs-72-23-17-14.zoominternet.net
72.23.17.15	A	dynamic-acs-72-23-17-15.zoominternet.net
72.23.17.20	A	dynamic-acs-72-23-17-20.zoominternet.net
72.23.17.35	A+PTR	dynamic-acs-72-23-17-35.zoominternet.net
72.23.17.41	A	dynamic-acs-72-23-17-41.zoominternet.net
72.23.17.60	A	dynamic-acs-72-23-17-60.zoominternet.net
72.23.17.63	A	dynamic-acs-72-23-17-63.zoominternet.net
72.23.17.118	A	dynamic-acs-72-23-17-118.zoominternet.net
72.23.17.139	A	dynamic-acs-72-23-17-139.zoominternet.net
72.23.17.231	A	dynamic-acs-72-23-17-231.zoominternet.net
72.23.17.240	A	dynamic-acs-72-23-17-240.zoominternet.net
72.23.19.38	A	dynamic-acs-72-23-19-38.zoominternet.net
72.23.19.60	A	dynamic-acs-72-23-19-60.zoominternet.net
72.23.20.35	A	static.knepperpress.com
72.23.20.36	A	ftp2.knepperpress.com
72.23.20.37	A	mail.knepperpress.com
72.23.20.37	A	mail.knepperpress.net
72.23.20.156	A	dynamic-acs-72-23-20-156.zoominternet.net
72.23.21.81	A	dynamic-acs-72-23-21-81.zoominternet.net
72.23.21.91	A	dynamic-acs-72-23-21-91.zoominternet.net
72.23.21.221	A	dynamic-acs-72-23-21-221.zoominternet.net
72.23.21.228	A	dynamic-acs-72-23-21-228.zoominternet.net
72.23.21.234	A	dynamic-acs-72-23-21-234.zoominternet.net
72.23.21.239	A	dynamic-acs-72-23-21-239.zoominternet.net
72.23.22.2	A	dynamic-acs-72-23-22-2.zoominternet.net
72.23.22.23	A	dynamic-acs-72-23-22-23.zoominternet.net
72.23.22.39	A	mfcms.org
72.23.22.48	A	dynamic-acs-72-23-22-48.zoominternet.net
72.23.22.62	A	dynamic-acs-72-23-22-62.zoominternet.net
72.23.22.70	A	dynamic-acs-72-23-22-70.zoominternet.net
72.23.22.75	A	dynamic-acs-72-23-22-75.zoominternet.net
72.23.22.83	A	dynamic-acs-72-23-22-83.zoominternet.net
72.23.22.87	A	dynamic-acs-72-23-22-87.zoominternet.net
72.23.22.96	A	dynamic-acs-72-23-22-96.zoominternet.net
72.23.22.129	A	dynamic-acs-72-23-22-129.zoominternet.net
72.23.22.250	A	dynamic-acs-72-23-22-250.zoominternet.net
72.23.23.2	A	dynamic-acs-72-23-23-2.zoominternet.net
72.23.23.24	A	tonygreer.net
72.23.23.64	PTR	dynamic-acs-72-23-23-64.zoominternet.net
72.23.27.10	A	dynamic-acs-72-23-27-10.zoominternet.net
72.23.28.19	A	web.iusis.com
72.23.28.27	A	usis1.com
72.23.28.30	A	smtp1.usis.com
72.23.28.34	A+PTR	metro.usis.com
72.23.28.35	PTR	www.usisone.com
72.23.28.36	A	verify.usis.com
72.23.28.47	A	tulsa.usis.com
72.23.28.54	A	nsg.usis-csd.com
72.23.28.69	A	owa1.usis.com
72.23.28.70	A	my.iusis.com
72.23.28.163	PTR	static-acs-72-23-28-163.zoominternet.net
72.23.28.188	A	my.usis.com
72.23.31.2	PTR	static-acs-72-23-31-2.zoominternet.net
72.23.31.18	A	gcmcpa.org
72.23.31.18	A	mail.gcmcpa.org
72.23.31.18	A	imap.gcmcpa.org
72.23.31.70	A	idlvpn.idldirect.com
72.23.31.72	A	crackworldwide.com
72.23.31.80	A	mailer2.idlww.com
72.23.31.80	A	mailer2.idlpop.com
72.23.31.99	PTR	www.bc3.edu
72.23.31.99	A	mybc3.bc3.edu
72.23.31.130	PTR	static-acs-72-23-31-130.zoominternet.net
72.23.31.133	A	southbutler.info
72.23.31.134	A	southbutleronline.org
72.23.31.136	A	virtualsouthbutler.org
72.23.31.137	A	sbcsd.net
72.23.31.230	A	buzz.enakids.com
72.23.31.230	A	atlas.enakids.com
72.23.31.235	A	mail3.carvaka.com
72.23.31.240	A	neccobi.com