Robtex

Up: 24.244.192.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 24.244.192.0/21
Down right: 24.244.200.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
24.244.192.3	PTR	static.host24-244-192-3.cygnal.ca
24.244.192.19	PTR	static.host24-244-192-19.cygnal.ca
24.244.192.33	PTR	static.host24-244-192-33.cygnal.ca
24.244.192.34	PTR	static.host24-244-192-34.cygnal.ca
24.244.192.35	PTR	static.host24-244-192-35.cygnal.ca
24.244.192.64	PTR	static.host24-244-192-64.cygnal.ca
24.244.192.80	PTR	static.host24-244-192-80.cygnal.ca
24.244.192.82	PTR	hydroexchange.niagarafallshydro.on.ca
24.244.192.98	A+PTR	ns2.cygnal.ca
24.244.192.99	PTR	static.host24-244-192-99.cygnal.ca
24.244.192.99	A	ns2.cygnal.ca
24.244.192.113	PTR	static.host24-244-192-113.cygnal.ca
24.244.192.128	PTR	static.host24-244-192-128.cygnal.ca
24.244.192.130	PTR	static.host24-244-192-130.cygnal.ca
24.244.192.131	PTR	dsbnem1.dsbn.edu.on.ca
24.244.192.145	PTR	static.host24-244-192-145.cygnal.ca
24.244.192.147	PTR	static.host24-244-192-147.cygnal.ca
24.244.192.160	PTR	static.host24-244-192-160.cygnal.ca
24.244.192.162	PTR	twea.dsbn.edu.on.ca
24.244.192.163	PTR	tweatest.dsbn.edu.on.ca
24.244.192.178	PTR	static.host24-244-192-178.cygnal.ca
24.244.192.179	PTR	static.host24-244-192-179.cygnal.ca
24.244.192.209	PTR	static.host24-244-192-209.cygnal.ca
24.244.192.210	PTR	static.host24-244-192-210.cygnal.ca
24.244.192.224	PTR	static.host24-244-192-224.cygnal.ca
24.244.192.225	PTR	static.host24-244-192-225.cygnal.ca
24.244.192.226	PTR	static.host24-244-192-226.cygnal.ca
24.244.192.227	PTR	static.host24-244-192-227.cygnal.ca
24.244.193.11	PTR	ns1.whiteradio.com
24.244.193.11	A	ns1.cygnal.ca
24.244.193.11	A	www.cygnal.ca