Robtex

Up: 173.197.232.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 173.197.232.0/23
Down right: 173.197.234.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
173.197.232.137	A+PTR	rrcs-173-197-232-137.west.biz.rr.com
173.197.234.34	A+PTR	rrcs-173-197-234-34.west.biz.rr.com
173.197.234.34	A	dns1.owensboro.org
173.197.234.34	A	owensboro-conventioncenter.com
173.197.234.35	A+PTR	rrcs-173-197-234-35.west.biz.rr.com
173.197.234.36	A+PTR	rrcs-173-197-234-36.west.biz.rr.com
173.197.234.36	A	mail.owensboro.org
173.197.234.37	PTR	mailer.owensboro.org
173.197.234.37	A	relay2.owensboro.org
173.197.234.37	A	owensboroparks.org
173.197.234.42	A+PTR	relay.owensboro.org
173.197.234.42	A	mail.omu.org
173.197.234.42	A	relay.owensboro-conventioncenter.com
173.197.234.45	PTR	owensboro.org
173.197.234.45	A	relay2.owensboro.org
173.197.234.45	A	mailboy2.rwra.org
173.197.234.82	A+PTR	rrcs-173-197-234-82.west.biz.rr.com
173.197.234.90	A	mail.yewelllaw.com
173.197.234.90	A	remote.yewelllaw.com
173.197.234.90	A	yewelllaw.com
173.197.234.114	PTR	rrcs-173-197-234-114.west.biz.rr.com
173.197.234.114	A	mail.bluegrassinternalmed.com
173.197.234.114	A	bluegrassinternalmed.com
173.197.234.194	PTR	rrcs-173-197-234-194.west.biz.rr.com
173.197.234.194	A	mail.shadowland.biz
173.197.234.194	A	mail.pfastech.com
173.197.234.226	A	blue.audubon-area.com
173.197.234.229	PTR	rrcs-173-197-234-229.west.biz.rr.com
173.197.234.229	A	ridegrits.org
173.197.234.229	A	tux02.audubon-area.com
173.197.234.232	A	postfix01.audubon-area.com
173.197.235.3	PTR	rrcs-173-197-235-3.west.biz.rr.com
173.197.235.3	A	miadproofs.com
173.197.235.4	A	mail.messenger-inquirer.com
173.197.235.10	A	pmgkygroup.com
173.197.235.12	PTR	rrcs-173-197-235-12.west.biz.rr.com
173.197.235.12	A	www.miarchive.com
173.197.235.12	A	miarchive.com