Robtex

Up: 173.255.6.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 173.255.6.0/25
Down right: 173.255.6.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
173.255.6.18	PTR	bigdomer.com
173.255.6.19	PTR	bluedotdiamond.com
173.255.6.20	PTR	duocanespecials.com
173.255.6.21	PTR	fasenandax.com
173.255.6.22	PTR	fullermedium.com
173.255.6.26	A	del.ph
173.255.6.26	A	dlpx.co
173.255.6.42	A	www.respondsocial.com
173.255.6.42	A	waggybuttpuppy.com
173.255.6.42	A	respondsocial.com
173.255.6.58	A	cheapdedicatedserver.com
173.255.6.59	A	colocation.net
173.255.6.60	A	emailserver.net
173.255.6.61	A	streamingserver.net
173.255.6.62	A	virtualprivateserver.net
173.255.6.66	PTR	asda.m-theorygrp.com
173.255.6.66	A	jessica.engoyan.com
173.255.6.66	A	ns1.engoyan.com
173.255.6.67	A	mail.m-theorygrp.com
173.255.6.70	A	voiprelay.com
173.255.6.70	A	mail.voiprelay.com
173.255.6.82	A	lnvbo.com
173.255.6.82	A	livenationvbo.com
173.255.6.90	A	mocambos.net
173.255.6.99	PTR	mx1.lastcauses.com
173.255.6.107	PTR	canoncalc.com
173.255.6.108	PTR	stustampeed.com
173.255.6.109	PTR	excelladaily.com
173.255.6.114	A+PTR	ibrahim.folhanet.com.br