Robtex

Up: 173.1.192.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 173.1.224.0/20
Down right: 173.1.240.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
173.1.225.2	PTR	173.1.225.2.reverse.gogrid.com
173.1.226.2	A+PTR	web23.i-tul.com
173.1.226.3	A+PTR	web23.i-tul.com
173.1.233.2	PTR	smtp1-2.yourlifehelper.com
173.1.233.3	PTR	smtp1-3.yourlifehelper.com
173.1.236.1	PTR	smtp4-1.yourlifehelper.com
173.1.241.3	PTR	173.1.241.3.servepath.com
173.1.242.169	A	evolvmma.com
173.1.242.174	A	trillity.net
173.1.242.174	A	trillity.org
173.1.242.175	A	mail.whatbird.com
173.1.243.37	A	dining-out.co.za
173.1.243.41	A	www.sleeping-out.co.za
173.1.243.101	A	download.nitropdf.com
173.1.243.116	A	www.hitcrime.com
173.1.243.116	A	admin.ownbrixhope.com
173.1.243.116	A	mail.crimehitters.net
173.1.243.130	PTR	173.1.243.130.servepath.com
173.1.243.130	A	hrgroupjobs.com
173.1.243.130	A	paragonemployment.com
173.1.243.140	A	jobmatchllc.com
173.1.243.162	A	dns1.scribesprodservices.com
173.1.243.163	PTR	173.1.243.163.servepath.com
173.1.243.163	A	dns2.scribesprodservices.com
173.1.243.171	A	dns1.locustdnsntwk.com
173.1.243.172	A	dns2.locustdnsntwk.com
173.1.243.242	A	mail.hrea.org
173.1.243.242	A	mail.hrea.net
173.1.243.242	A	hrea.eu
173.1.244.0	PTR	173.1.244.0.servepath.com
173.1.244.1	PTR	173.1.244.1.servepath.com
173.1.244.82	A	worldteamsite.org
173.1.244.153	A	prelegalassist.com.ec
173.1.244.155	A	mail.prelegalassist.com
173.1.244.155	A	chengue.prelegalassist.com
173.1.244.155	A	*.prelegalassist.com
173.1.245.2	PTR	173.1.245.2.servepath.com
173.1.245.6	A	hashley.com
173.1.245.6	A	www.hashley.com
173.1.245.6	A	hashley.net
173.1.245.129	PTR	signup.angus2012.com
173.1.245.129	PTR	ssl.angus2012.com
173.1.245.129	A	angus2012.com
173.1.245.167	A	blog.funnelbrain.com
173.1.245.172	A	detuno.com
173.1.245.184	A	www2.farapp.com
173.1.253.3	PTR	173.1.253.3.servepath.com
173.1.254.0	PTR	173.1.254.0.servepath.com