Robtex

Up: 204.15.96.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 204.15.104.0/22
Down right: 204.15.108.0/22

IP	Type	Hostname
204.15.104.18	PTR	204-15-104-18.dhcp.spwl.net
204.15.104.118	PTR	204-15-104-118.dhcp.spwl.net
204.15.104.138	PTR	204-15-104-138.dhcp.spwl.net
204.15.104.205	PTR	204-15-104-205.dhcp.spwl.net
204.15.106.32	PTR	204-15-106-32.dhcp.spwl.net
204.15.106.83	PTR	204-15-106-83.dhcp.spwl.net
204.15.106.214	PTR	204-15-106-214.dhcp.spwl.net
204.15.108.11	A	ns1.madcitybroadband.com
204.15.108.12	PTR	dhcp1.madcitybroadband.com
204.15.108.20	PTR	mail.madcitybroadband.com
204.15.108.26	PTR	ts.madcitybroadband.com
204.15.108.28	PTR	subgate-eth1.madcitybroadband.com
204.15.108.71	A	ns2.madcitybroadband.com
204.15.108.106	PTR	subgate-eth0.madcitybroadband.com
204.15.108.130	PTR	r-edge-222-01-lo-0.net.madcitybroadband.com
204.15.108.137	PTR	r-core-222-01-lo-0.net.madcitybroadband.com
204.15.108.177	PTR	r-edge-222-01-ge-0-0-1-0.net.madcitybroadband.com
204.15.108.241	PTR	r-edge-222-01-ge-0-0-0-0.net.madcitybroadband.com
204.15.110.26	PTR	204-15-110-26.dynamic.madcitybroadband.com
204.15.110.120	PTR	204-15-110-120.dynamic.madcitybroadband.com
204.15.110.131	A	msn-wi-us.prcdn.net
204.15.110.154	PTR	204-15-110-154.dynamic.madcitybroadband.com
204.15.110.163	A	msn-wi-us.prcdn.net
204.15.110.170	PTR	privax-sv4-170.cust.hoyosconsulting.com
204.15.110.185	PTR	204-15-110-185.dynamic.madcitybroadband.com
204.15.110.194	PTR	privax-sv4-194.cust.hoyosconsulting.com
204.15.110.202	PTR	204-15-110-202.dynamic.madcitybroadband.com
204.15.111.16	PTR	204-15-111-16.dynamic.madcitybroadband.com
204.15.111.42	PTR	privax-sv1-42.cust.hoyosconsulting.com
204.15.111.59	PTR	privax-sv1-59.cust.hoyosconsulting.com
204.15.111.82	PTR	204-15-111-82.dynamic.madcitybroadband.com
204.15.111.113	PTR	privax-sv1-113.cust.hoyosconsulting.com
204.15.111.137	PTR	204-15-111-137.dynamic.madcitybroadband.com
204.15.111.152	PTR	privax-sv2-152.cust.hoyosconsulting.com
204.15.111.208	PTR	204-15-111-208.dynamic.madcitybroadband.com
204.15.111.243	PTR	204-15-111-243.dynamic.madcitybroadband.com
204.15.111.249	PTR	privax-sv2-249.cust.hoyosconsulting.com