Robtex

Up: 204.138.24.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 204.138.24.0/24
Down right: 204.138.25.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
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	A+PTR	mail.wellingtoncdsb.ca
204.138.24.4	A	mail.wcdsb.org
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