Robtex

Up: 204.138.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 204.138.0.0/20
Down right: 204.138.16.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
204.138.2.4	A+PTR	mx2.ugdsb.on.ca
204.138.2.34	PTR	mobile.wellingtoncssb.edu.on.ca
204.138.2.34	A	ilp-guelph.org
204.138.2.36	PTR	dmx.wellingtoncssb.edu.on.ca
204.138.2.44	A	www.schooltocareers.ca
204.138.3.52	PTR	host52.site3.wellingtoncssb.edu.on.ca
204.138.9.202	PTR	ns1.wellingtoncdsb.ca
204.138.9.203	PTR	ns2.wellingtoncdsb.ca
204.138.9.205	PTR	mail.wellingtoncdsb.ca
204.138.9.232	A	lourdeschs.com
204.138.9.234	A	sjbosco.ca
204.138.19.2	PTR	host2.site19.wellingtoncssb.edu.on.ca
204.138.19.130	PTR	host130.site19.wellingtoncssb.edu.on.ca
204.138.22.109	PTR	host109.site22.wellingtoncssb.edu.on.ca
204.138.24.2	A+PTR	ns1.wcssb.ca
204.138.24.2	A+PTR	ns1.wellingtoncdsb.ca
204.138.24.2	PTR	ns1.edu.wellingtoncdsb.ca
204.138.24.3	PTR	ns2.wcssb.ca
204.138.24.3	PTR	ns2.wellingtoncdsb.ca
204.138.24.3	PTR	ns2.edu.wellingtoncdsb.ca
204.138.24.4	PTR	mail.wellingtoncdsb.ca
204.138.24.79	A+PTR	www.wellingtoncssb.edu.on.ca
204.138.24.79	PTR	www.wellingtoncdsb.ca
204.138.24.79	PTR	www.wcssb.ca
204.138.24.99	PTR	unallocated-static.rogers.com
204.138.24.145	PTR	unallocated-static.rogers.com
204.138.24.149	PTR	unallocated-static.rogers.com
204.138.24.160	PTR	unallocated-static.rogers.com
204.138.24.172	PTR	unallocated-static.rogers.com
204.138.24.231	PTR	unallocated-static.rogers.com
204.138.24.231	A	bishopmac.ca
204.138.24.232	PTR	unallocated-static.rogers.com
204.138.25.67	PTR	unallocated-static.rogers.com
204.138.25.109	PTR	host109.site25.wellingtoncssb.edu.on.ca
204.138.25.172	PTR	unallocated-static.rogers.com
204.138.25.198	PTR	unallocated-static.rogers.com
204.138.25.248	PTR	unallocated-static.rogers.com
204.138.26.6	A+PTR	nssc02-alt.getjar.com
204.138.26.16	A	my.getjar.com
204.138.26.80	A	auth20120430.gomonetworks.com
204.138.26.120	A	rptuse20120814.gomonetworks.com
204.138.26.143	A+PTR	beta.getjar.com
204.138.26.143	A	m.beta.getjar.com
204.138.26.151	A	www.sc.getjar.com
204.138.26.152	A	download.getjar.com
204.138.26.164	A	betatester.getjar.com
204.138.26.168	A	user20120430.getjar.com
204.138.26.172	A	localz20120810.getjar.com
204.138.27.2	A+PTR	host.thehostedbox.com
204.138.27.2	PTR	ns.thehostedbox.com
204.138.27.2	PTR	thebox-new.thehostedbox.com
204.138.27.10	PTR	ip10.thehostedbox.com
204.138.27.32	A	musica-viva.pinetree.org
204.138.27.34	A+PTR	getround2it.com
204.138.27.35	A	martinlee.ca
204.138.27.42	A	keeperofmaps.com
204.138.28.41	A	southwestrugby.com