Robtex

Up: 66.158.0.0/17
Can't show all results, try to descend to a more specific CIDR
Down left: 66.158.0.0/19
Down right: 66.158.32.0/19
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.158.14.20	A	host20.stuart.iit.edu
66.158.14.21	A	host21.stuart.iit.edu
66.158.16.2	PTR	ip16-2.csu.edu
66.158.18.45	PTR	ip18-45.csu.edu
66.158.18.212	PTR	ip18-212.csu.edu
66.158.19.2	PTR	ip19-2.csu.edu
66.158.31.25	A	mail3.ihda.org
66.158.34.2	A	sierra-db.addisonlibrary.org
66.158.34.3	A	addison.lib.il.us
66.158.34.5	A	appsvr.apl2k.addison.lib.il.us
66.158.34.6	A+PTR	exchange07.addisonlibrary.org
66.158.35.130	A	central.ahml.net
66.158.35.139	A	barracuda.ahml.info
66.158.35.139	A	barracuda.ahml.net
66.158.35.148	A	iii.ahml.info
66.158.36.34	A	smtp.swcd911.org
66.158.36.130	PTR	trixie.nslsilus.org
66.158.38.81	A	pensant.com
66.158.39.11	A	nslsstaff.org
66.158.42.35	PTR	vogmail.glenview.il.us
66.158.42.57	PTR	vogmail.glenview.il.us
66.158.42.61	PTR	smtp1.glenview.il.us
66.158.42.67	A	mail.graceschool.net
66.158.42.131	PTR	eyedoc.ico.edu
66.158.42.131	PTR	smtp.ico.edu
66.158.42.153	A	theview.ico.edu
66.158.42.157	A	internships.ico.edu
66.158.42.163	A	citrix.ico.edu
66.158.42.171	A	ico-proxy.ico.edu
66.158.44.196	PTR	mail.lifespringnetwork.org
66.158.45.195	A+PTR	mail.epd.org
66.158.45.253	A	ns1.epd.org
66.158.46.6	A	wdgc.csd99.org
66.158.46.33	A	staff-mail.csd99.org
66.158.46.38	A	csd99.org.mx3.csd99.rcimx.net
66.158.46.38	A	amx.csd99.k12.il.us.redcondor.net
66.158.48.98	A	uno-online.org
66.158.48.98	A	unojams.com
66.158.48.99	PTR	mail2.uno-online.org
66.158.48.99	PTR	mail2.unocharterschools.org
66.158.49.13	A+PTR	www.prairiestate.edu
66.158.49.13	A	prairiestate.edu
66.158.49.15	A+PTR	webadvisor.prairiestate.edu
66.158.49.17	A	webadvisortest.prairiestate.edu
66.158.49.19	PTR	ezproxy.prairiestate.edu
66.158.49.19	A	ns4.ezproxy.prairiestate.edu
66.158.49.138	A	emaila.prairiestate.edu
66.158.49.138	A	email.prairiestate.edu
66.158.49.138	A	mail.prairiestate.edu
66.158.49.253	A	ns4.ezproxy.prairiestate.edu
66.158.49.253	A	ns4.prairiestate.edu
66.158.50.130	PTR	mail.aapld.org
66.158.50.131	PTR	www.aapld.org
66.158.51.99	PTR	mandela.swyc.org
66.158.51.194	PTR	mail.vil.carpentersville.il.us
66.158.52.130	PTR	mail.cul-chicago.org
66.158.52.130	PTR	owa.cul-chicago.org
66.158.53.144	A	mail2.iccowboys.net
66.158.54.51	A	ezproxy.vapld.info
66.158.55.100	A	ns3.lakeforestdance.com
66.158.55.194	A	ns1.thecityoflakeforest.org
66.158.55.194	A	ns1.thecityoflakeforest.com
66.158.55.194	A	ns1.lftv.org
66.158.55.238	PTR	mail.cityoflakeforest.com
66.158.56.66	A	ns1.lfparksandrec.com
66.158.56.66	A	ns1.lakeforestdance.com
66.158.56.66	A	ns1.dickinsonhall.com
66.158.58.47	PTR	static-66-158-58-47.cityofevanston.org
66.158.58.80	PTR	static-66-158-58-80.cityofevanston.org
66.158.58.99	PTR	static-66-158-58-99.cityofevanston.org
66.158.58.120	PTR	static-66-158-58-120.cityofevanston.org
66.158.58.133	PTR	static-66-158-58-133.cityofevanston.org
66.158.58.197	PTR	static-66-158-58-197.cityofevanston.org
66.158.60.1	A+PTR	icn-gw.elgin.edu
66.158.60.2	A	ecc-gw.elgin.edu
66.158.60.5	A+PTR	ns1.elgin.edu
66.158.60.6	A	mail2.elgin.edu
66.158.60.50	A	elgin.edu
66.158.60.94	A	elgin.edu
66.158.60.96	A+PTR	oldap.elgin.edu
66.158.60.99	A	office.elgin.edu
66.158.60.103	A	autodiscover.elgin.edu
66.158.60.124	A	autodiscover.elgin.edu
66.158.60.252	A+PTR	nc.elgin.edu
66.158.60.253	A	lab-nat-user.elgin.edu
66.158.60.254	A+PTR	office-nat-user.elgin.edu
66.158.61.21	A	naperblvdlibrary.info
66.158.61.21	A	naperblvdlibrary.org
66.158.61.21	A	napervillelibrary.info
66.158.61.165	PTR	mail.homerlibrary.org
66.158.63.245	A	ifolder.troy30c.org