Robtex

Up: 192.133.42.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 192.133.42.0/25
Down right: 192.133.42.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.133.42.2	PTR	doa.dot.state.az.us
192.133.42.4	A+PTR	sdc.azdot.gov
192.133.42.5	A	azdbe.com
192.133.42.5	A	azdbe.org
192.133.42.5	A	www.azdbe.com
192.133.42.17	A+PTR	lord.azdot.gov
192.133.42.25	PTR	mcd.azfuel.com
192.133.42.25	A+PTR	casarray.azdot.gov
192.133.42.25	PTR	dproxy.azdot.gov
192.133.42.26	PTR	async.azdot.gov
192.133.42.31	A+PTR	www2.azdot.gov
192.133.42.31	A+PTR	wwwtest.azdot.gov
192.133.42.33	A	apps.azdot.gov
192.133.42.40	PTR	adotdbe.com
192.133.42.40	PTR	azfuel.com
192.133.42.40	A+PTR	aztribaltransportation.com
192.133.42.41	PTR	azdot.gov
192.133.42.41	PTR	www.azdot.gov
192.133.42.51	A+PTR	wwwa.azdot.gov
192.133.42.53	A+PTR	mobilex.azdot.gov
192.133.42.54	A+PTR	edge1.azdot.gov
192.133.42.55	PTR	edge2.azdot.gov
192.133.42.60	A+PTR	adotws.azdot.gov
192.133.42.173	A+PTR	citrix.azdot.gov
192.133.42.173	A+PTR	citrix1.azdot.gov
192.133.42.173	A+PTR	remote.azdot.gov
192.133.42.174	A+PTR	citrix2.azdot.gov
192.133.42.175	PTR	partners.azdot.gov
192.133.42.176	A	gateway.azdot.gov
192.133.42.178	PTR	gateway.azdot.gov
192.133.42.188	A	gis.azdot.gov
192.133.42.189	A	dproxy.azdot.gov
192.133.42.193	A	azutracs.com
192.133.42.224	A+PTR	ftp.azdot.gov
192.133.42.224	A	ns2.azdot.gov
192.133.42.230	A+PTR	smtp4.azdot.gov
192.133.42.230	PTR	smtp4.dot.state.az.us
192.133.42.231	A+PTR	ns1.azdot.gov
192.133.42.231	PTR	ns1.dot.state.az.us
192.133.42.233	A+PTR	edge02.azdot.gov
192.133.42.233	PTR	smtp2.dot.state.az.us
192.133.42.234	A+PTR	edge01.azdot.gov
192.133.42.234	PTR	smtp1.dot.state.az.us
192.133.42.235	A+PTR	smtp3.azdot.gov
192.133.42.236	A+PTR	mvd.azdot.gov
192.133.42.237	A+PTR	mail.azdot.gov