Robtex

Up: 71.13.72.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 71.13.72.0/23
Down right: 71.13.74.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
71.13.72.2	A+PTR	71-13-72-2.static.aldl.mi.charter.com
71.13.72.2	A	mail.stlouismi.com
71.13.72.59	A	mail.penningsandsons.com
71.13.72.93	PTR	71-13-72-93.static.aldl.mi.charter.com
71.13.72.97	A+PTR	71-13-72-97.static.aldl.mi.charter.com
71.13.72.98	A	mail.generationsseniorliving.com
71.13.72.98	A	mail.ipaliving.com
71.13.72.117	A	ns2.propellerheadtech.com
71.13.72.117	A	mail.propellerheadtech.com
71.13.72.118	PTR	71-13-72-118.static.aldl.mi.charter.com
71.13.72.118	A	ns2.propellerheadtech.com
71.13.72.118	A	mail.propellerheadtech.com
71.13.72.138	PTR	71-13-72-138.static.aldl.mi.charter.com
71.13.72.219	A	danduman2.net
71.13.73.46	PTR	071-013-073-046.biz.spectrum.com
71.13.73.46	A	71-13-73-46.static.aldl.mi.charter.com
71.13.73.74	A+PTR	mail.gtd.com
71.13.73.74	A	gtd.com
71.13.73.75	PTR	71-13-73-75.static.aldl.mi.charter.com
71.13.73.75	A	ns1.gtd.com
71.13.73.75	A	*.gtd.com
71.13.73.115	A	71-13-73-115.static.aldl.mi.charter.com
71.13.73.210	A	dependablefireprotection.com
71.13.73.210	A	mail.dependablefireprotection.com
71.13.73.210	A	*.dependablefireprotection.com
71.13.73.214	A	71-13-73-214.static.aldl.mi.charter.com
71.13.73.246	PTR	71-13-73-246.static.aldl.mi.charter.com
71.13.73.246	A	cwsip.com
71.13.74.10	A	71-13-74-10.static.aldl.mi.charter.com
71.13.74.22	A	remote.heathtownship.net
71.13.74.89	A+PTR	71-13-74-89.static.aldl.mi.charter.com
71.13.74.89	A	micmn.org
71.13.74.154	A	remote.unifabcorp.com
71.13.74.154	A	mail.unifabcorp.com
71.13.74.186	A	mail.baremandairy.com
71.13.74.198	PTR	ach-prod-smtp-000.nks.net
71.13.74.198	A	free.nks.net
71.13.74.199	PTR	nks-web-01.nks.net
71.13.74.199	A	free.nks.net
71.13.74.200	PTR	nks-web-00.nks.net
71.13.74.200	A	www.nks.info
71.13.74.200	A	nks.info
71.13.74.202	PTR	rh-web-00.nks.net
71.13.74.202	A	free.nks.net
71.13.74.203	PTR	icb-web-00.nks.net
71.13.74.203	A	free.nks.net
71.13.74.206	PTR	ctc-host-001.nks.net
71.13.74.206	A	free.nks.net
71.13.74.206	A	suzanponte.com
71.13.74.207	PTR	ctc-rp-000.nks.net
71.13.74.207	A	free.nks.net
71.13.74.208	PTR	qc-dev-app-000.nks.net
71.13.74.208	A	free.nks.net
71.13.74.209	A+PTR	cet-web-00.nks.net
71.13.74.209	A	thetarpleys.org
71.13.74.209	A	alluringevents.net
71.13.74.211	PTR	nks-ntp-00.nks.net
71.13.74.211	A	free.nks.net
71.13.74.212	A+PTR	nks-list-00.nks.net
71.13.74.213	PTR	ach-prod-sftp-000.nks.net
71.13.74.213	A	free.nks.net
71.13.74.214	A+PTR	bjh-web-00.nks.net
71.13.74.214	A	free.nks.net
71.13.74.214	A	cavedogs.com
71.13.74.216	A+PTR	rtw-web-00.nks.net
71.13.74.216	A	www.funbrix.com
71.13.74.216	A	funbrix.com
71.13.74.217	PTR	nks-web-07.nks.net
71.13.74.217	A	free.nks.net
71.13.74.219	PTR	nks-web-02.nks.net
71.13.74.219	A	free.nks.net
71.13.74.221	PTR	nab-dev-host-000.nks.net
71.13.74.221	A	free.nks.net
71.13.74.224	PTR	wpb-dev-crm-000.nks.net
71.13.74.224	A	c.nks.us
71.13.74.224	A	nks-prod-mail-800.nks.net
71.13.74.225	PTR	wpb-qa-crm-000.nks.net
71.13.74.225	A	c.nks.us
71.13.74.225	A	nks-prod-mail-800.nks.net
71.13.74.229	PTR	tcrd-dev-web-000.nks.net
71.13.74.229	A	traversecityrollerderby.com
71.13.74.229	A	tcrollerderby.com
71.13.74.233	A	eric.bravick.name
71.13.74.237	PTR	hm-prod-crm-000.nks.net
71.13.74.237	A	c.nks.us
71.13.74.237	A	nks-prod-mail-800.nks.net
71.13.74.239	PTR	71-13-74-239.static.aldl.mi.charter.com
71.13.74.240	A	nks-smtp-00.nks.net
71.13.74.241	A+PTR	71-13-74-241.static.aldl.mi.charter.com
71.13.74.241	A	suttonsbaylaw.com
71.13.74.247	A	idf-guest-001.nks.net
71.13.74.249	PTR	71-13-74-249.static.aldl.mi.charter.com
71.13.74.249	A	randomdomain.com
71.13.75.16	PTR	71-13-75-16.static.aldl.mi.charter.com
71.13.75.31	A+PTR	71-13-75-31.static.aldl.mi.charter.com
71.13.75.50	A	mail.naylorlandscape.com
71.13.75.118	A+PTR	mail2.goodwillnmi.org
71.13.75.130	A+PTR	71-13-75-130.static.aldl.mi.charter.com
71.13.75.214	PTR	71-13-75-214.static.aldl.mi.charter.com
71.13.75.214	A	micomputers4u.com
71.13.75.214	A	cmich.us
71.13.75.218	PTR	71-13-75-218.static.aldl.mi.charter.com
71.13.75.218	A	mail.slpc.org
71.13.75.222	A	mail.vansplumbingandheating.com
71.13.75.222	A	mail.vansplumbing.com