Robtex

Up: 216.52.140.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 216.52.142.0/24
Down right: 216.52.143.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.52.142.30	A+PTR	ns1.williamblair.com
216.52.142.54	PTR	smtp3.williamblair.com
216.52.142.54	A	smtp1.williamblair.com
216.52.142.54	A	smtp2.williamblair.com
216.52.142.55	PTR	smtp4.williamblair.com
216.52.142.63	A	www.wbremote.com
216.52.142.63	A	wbremote.com
216.52.142.98	A+PTR	riva.williamblair.com
216.52.142.100	A	rdocs.com
216.52.142.100	A	www.rdocs.com
216.52.142.103	A	selectinvestmentpartners.com
216.52.142.103	A	selectpartners.net
216.52.142.103	A	williamblairselect.com
216.52.142.170	A	ftp.williamblair.com
216.52.142.201	A	wbsip.williamblair.com
216.52.143.7	A+PTR	c-216-52-143-7.premium-chicago.nfoservers.com
216.52.143.17	PTR	c-216-52-143-17.internap-chicago.nfoservers.com
216.52.143.21	PTR	hiredgunsoftware.com
216.52.143.21	A	christinamleedesigns.com
216.52.143.21	A	rob-n-steph.com
216.52.143.22	PTR	c-216-52-143-22.internap-chicago.nfoservers.com
216.52.143.22	A	mail.pingpulse.net
216.52.143.22	A	mail.aeonianrealms.com
216.52.143.27	A	dns4.ty2service.com
216.52.143.41	PTR	c-216-52-143-41.managed-vds.internap-chicago.nfoservers.com
216.52.143.41	A	szf1.mechatheslag.net
216.52.143.55	PTR	v-216-52-143-55.unman-vds.internap-chicago.nfoservers.com
216.52.143.55	A	mail.beanyserv.com
216.52.143.55	A	nerdyparker.com
216.52.143.56	A	heno-yatri.com
216.52.143.61	PTR	c-216-52-143-61.premium-chicago.nfoservers.com
216.52.143.68	PTR	v-216-52-143-68.unman-vds.premium-chicago.nfoservers.com
216.52.143.70	PTR	c-216-52-143-70.managed-vds.premium-chicago.nfoservers.com
216.52.143.75	A+PTR	c-216-52-143-75.premium-chicago.nfoservers.com
216.52.143.78	PTR	d-216-52-143-78.ded-machine.premium-chicago.nfoservers.com
216.52.143.80	A+PTR	c-216-52-143-80.managed-vds.premium-chicago.nfoservers.com
216.52.143.93	PTR	c-216-52-143-93.internap-chicago.nfoservers.com
216.52.143.93	A	rustperks.com
216.52.143.97	A+PTR	v-216-52-143-97.unman-vds.premium-chicago.nfoservers.com
216.52.143.97	A	ns4.ravenna.com
216.52.143.97	A	coloring.com
216.52.143.102	A	c-216-52-143-102.premium-chicago.nfoservers.com
216.52.143.103	PTR	v-216-52-143-103.unman-vds.internap-chicago.nfoservers.com
216.52.143.106	PTR	c-216-52-143-106.premium-chicago.nfoservers.com
216.52.143.109	A+PTR	c-216-52-143-109.premium-chicago.nfoservers.com
216.52.143.109	A	brickjungle.org
216.52.143.109	A	dieslow.net
216.52.143.111	A+PTR	v-216-52-143-111.unman-vds.premium-chicago.nfoservers.com
216.52.143.118	A+PTR	www.whendarknessfalls.org
216.52.143.118	A	mail.whendarknessfalls.org
216.52.143.118	A	neptune.whendarknessfalls.org
216.52.143.119	PTR	c-216-52-143-119.managed-vds.premium-chicago.nfoservers.com
216.52.143.120	PTR	c-216-52-143-120.internap-chicago.nfoservers.com
216.52.143.136	PTR	v-216-52-143-136.unman-vds.premium-chicago.nfoservers.com
216.52.143.137	PTR	v-216-52-143-137.unman-vds.internap-chicago.nfoservers.com
216.52.143.137	A	frontlineart.com
216.52.143.137	A	shadowsnap.net
216.52.143.140	A+PTR	c-216-52-143-140.premium-chicago.nfoservers.com
216.52.143.140	A	neptune.whendarknessfalls.org
216.52.143.155	A+PTR	v-216-52-143-155.unman-vds.premium-chicago.nfoservers.com
216.52.143.161	PTR	v-216-52-143-161.unman-vds.internap-chicago.nfoservers.com
216.52.143.161	A	ncwgaming.com
216.52.143.162	A	c-216-52-143-162.managed-ded.premium-chicago.nfoservers.com
216.52.143.165	A+PTR	c-216-52-143-165.managed-vds.premium-chicago.nfoservers.com
216.52.143.167	PTR	c-216-52-143-167.premium-chicago.nfoservers.com
216.52.143.167	A	ns1.bricksquad.net
216.52.143.167	A	mail.bricksquad.net
216.52.143.171	PTR	c-216-52-143-171.premium-chicago.nfoservers.com
216.52.143.178	PTR	c-216-52-143-178.managed-vds.premium-chicago.nfoservers.com
216.52.143.185	A	vintagejailbreak.org
216.52.143.189	PTR	v-216-52-143-189.unman-vds.internap-chicago.nfoservers.com
216.52.143.197	A	ysader.com
216.52.143.214	A+PTR	v-216-52-143-214.unman-vds.premium-chicago.nfoservers.com
216.52.143.230	PTR	v-216-52-143-230.unman-vds.internap-chicago.nfoservers.com
216.52.143.232	PTR	c-216-52-143-232.managed-vds.premium-chicago.nfoservers.com
216.52.143.233	A	otsgaming.com
216.52.143.233	A	teamtalk.info
216.52.143.234	A+PTR	ns2.phat.net
216.52.143.234	A	ns2.monix.com
216.52.143.234	A	mail.modem.org
216.52.143.236	PTR	c-216-52-143-236.premium-chicago.nfoservers.com
216.52.143.236	A	igta.co.uk
216.52.143.236	A	www.igta.co.uk
216.52.143.241	A	pqlstats.com
216.52.143.243	PTR	v-216-52-143-243.unman-vds.premium-chicago.nfoservers.com
216.52.143.245	PTR	c-216-52-143-245.internap-chicago.nfoservers.com
216.52.143.246	PTR	c-216-52-143-246.managed-ded.premium-chicago.nfoservers.com
216.52.143.247	A	theblackmarketgaming.com
216.52.143.249	A+PTR	v-216-52-143-249.unman-vds.premium-chicago.nfoservers.com
216.52.143.250	A	www.toxstyx.net
216.52.143.250	A	www.nitoria.net
216.52.143.252	PTR	c-216-52-143-252.premium-chicago.nfoservers.com
216.52.143.253	PTR	c-216-52-143-253.internap-chicago.nfoservers.com
216.52.143.253	A	router.premium-chicago.nfoservers.com
216.52.143.255	PTR	broadcast.internap-chicago.nfoservers.com
216.52.143.255	A	broadcast.premium-chicago.nfoservers.com