Robtex

Up: 163.191.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 163.191.32.0/20
Down right: 163.191.48.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
163.191.36.2	PTR	trs.il.gov
163.191.36.2	A+PTR	trs.illinois.gov
163.191.36.2	A+PTR	www.trs.il.gov
163.191.36.3	PTR	trs-spfld06.trs.state.il.us
163.191.36.5	PTR	trs-spfld01.trs.state.il.us
163.191.36.6	PTR	trs-spfld05.trs.state.il.us
163.191.40.14	A	readerextensions.illinois.gov
163.191.40.21	A+PTR	apps.illinois.gov
163.191.40.21	A+PTR	extapps.illinois.gov
163.191.40.21	A+PTR	extappsqa.illinois.gov
163.191.40.28	PTR	ags10.dot.illinois.gov
163.191.40.28	PTR	ags10s1.dot.illinois.gov
163.191.40.28	PTR	ags10s2.dot.illinois.gov
163.191.40.33	PTR	qaepaaem.illinois.gov
163.191.40.33	A+PTR	ilextqaboenosso.illinois.gov
163.191.40.33	PTR	medicalcannabispatients.illinois.gov
163.191.40.35	PTR	appsecure.dph.illinois.gov
163.191.40.35	PTR	appsecureqa.dph.illinois.gov
163.191.40.35	PTR	nesp.dhs.illinois.gov
163.191.40.36	PTR	dph.partner.illinois.gov
163.191.40.102	A	partner.illinois.gov
163.191.40.102	A	fsresource.illinois.gov
163.191.45.40	A	mail.illinois.gov
163.191.45.100	A+PTR	istats.state.il.us
163.191.45.100	PTR	nssoi.state.il.us
163.191.60.26	A	webmail.illinois.gov
163.191.60.28	A+PTR	hcwrpub.dph.illinois.gov
163.191.60.43	A+PTR	gettingaroundillinois.com
163.191.60.43	A+PTR	m.gettingaroundillinois.com
163.191.60.43	A+PTR	wrc.gettingaroundillinois.com
163.191.60.62	PTR	dot2.illinois.gov
163.191.60.62	PTR	www.itt.illinois.gov
163.191.60.62	PTR	www.ptab.illinois.gov
163.191.60.64	A+PTR	benefits.ides.illinois.gov
163.191.60.72	PTR	ishsp.org
163.191.60.72	PTR	accountability.illinois.gov
163.191.60.72	PTR	cmsweb.illinois.gov
163.191.60.100	PTR	www.abe.illinois.gov
163.191.60.100	PTR	itoftp.illinois.gov
163.191.60.100	A+PTR	webservices.illinois.gov
163.191.60.103	PTR	business.il.gov
163.191.60.103	PTR	www.business.illinois.gov
163.191.60.103	PTR	www.crsa.illinois.gov
163.191.60.104	PTR	smtp04.illinois.gov
163.191.60.130	A	www.illinois.gov
163.191.60.140	A	getcovered.illinois.gov
163.191.60.140	A	www2.illinois.gov
163.191.60.168	A+PTR	lists.illinois.gov
163.191.60.168	PTR	www.lists.illinois.gov
163.191.60.168	PTR	listserver.idph.state.il.us
163.191.60.171	A+PTR	medi.hfs.illinois.gov
163.191.60.174	A+PTR	www.dnr.illinois.gov
163.191.60.179	PTR	www.webapps.illinois.gov
163.191.60.179	PTR	grants.illinois.gov
163.191.60.179	PTR	webapps.illinois.gov
163.191.60.198	A	cmsapps.illinois.gov
163.191.60.198	A	cms.illinois.gov
163.191.60.198	A	courts.illinois.gov
163.191.60.228	A+PTR	securemail.illinois.gov
163.191.60.228	A+PTR	smtp13.illinois.gov
163.191.60.241	PTR	dpsint.hfs.illinois.gov
163.191.60.241	A+PTR	gipcs.hfs.illinois.gov
163.191.60.241	PTR	newhire.hfs.illinois.gov
163.191.60.242	PTR	websvcs.hfs.illinois.gov
163.191.61.51	A+PTR	idfpr.com
163.191.61.51	A+PTR	ildpr.com
163.191.61.51	PTR	dfpr.state.il.us
163.191.61.54	PTR	www.obresecureclear.state.il.us