Robtex

Up: 208.123.72.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 208.123.73.0/25
Down right: 208.123.73.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
208.123.73.18	PTR	forum.pfsense.org
208.123.73.18	A	www1.atx.pfmechanics.com
208.123.73.21	PTR	bohica.epeolatry.net
208.123.73.22	PTR	neo.epeolatry.net
208.123.73.22	A	sdavis.us
208.123.73.22	A	tanlora.com
208.123.73.24	A	swifthoundbows.com
208.123.73.24	A	ecnnet.org
208.123.73.24	A	ns.freeside.com
208.123.73.29	A	skinnydog.org
208.123.73.37	A	store.netgate.com
208.123.73.68	PTR	www1.atx.pfmechanics.com
208.123.73.68	A	doc.pfsense.org
208.123.73.69	A+PTR	www.pfsense.org
208.123.73.69	A	pfsense.com
208.123.73.69	A	www2.atx.pfmechanics.com
208.123.73.70	A	forum.pfsense.org
208.123.73.71	A	portal.pfsense.org
208.123.73.73	A	store.netgate.com
208.123.73.73	A	netgate.com
208.123.73.73	A	netgate.biz
208.123.73.75	A	redmine.pfsense.org
208.123.73.78	A	lists.pfsense.org
208.123.73.79	PTR	customercare.netgate.com
208.123.73.79	A	mail.pfsense.org
208.123.73.79	A	mail.livebsd.com
208.123.73.80	A	ns1.netgate.com
208.123.73.80	A	beta.pfsense.org
208.123.73.81	A	files.atx.pfsense.org
208.123.73.82	PTR	snapshots.atx.pfmechanics.com
208.123.73.82	A	updates.atx.pfmechanics.com
208.123.73.83	A	snapshots.pfsense.org
208.123.73.84	A+PTR	www.netgate.com
208.123.73.84	A	netgate.com
208.123.73.85	A	www.firmware.netgate.com
208.123.73.85	A	firmware.netgate.com
208.123.73.88	A+PTR	packages.atx.pfmechanics.com
208.123.73.88	A	packages.pfsense.org
208.123.73.91	PTR	db3.netgate.com
208.123.73.91	A	magic.pfmechanics.com
208.123.73.91	A	magic.havensystech.com
208.123.73.93	PTR	nrdm.netgate.com
208.123.73.93	A	acb.netgate.com
208.123.73.93	A	ews.netgate.com
208.123.73.148	A	cmb.xyz
208.123.73.151	A	mail.jdl.com
208.123.73.151	A	mylo.jdl.com
208.123.73.151	A	mail.centraltexaswineguild.org
208.123.73.199	A+PTR	forum.netgate.com