Robtex

Up: 178.72.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 178.72.24.0/22
Down right: 178.72.28.0/22

IP	Type	Hostname
178.72.24.0	PTR	ip-0-24-72-178.dialup.ice.net
178.72.25.2	PTR	ip-2-25-72-178.dialup.ice.net
178.72.28.0	PTR	ip-0-28-72-178.dialup.ice.net
178.72.29.2	PTR	ip-2-29-72-178.dialup.ice.net
178.72.29.126	A	ip-126-29-72-178.dialup.ice.net
178.72.29.146	A	ip-146-29-72-178.dialup.ice.net
178.72.29.208	PTR	ip-208-29-72-178.dialup.ice.net
178.72.30.2	A+PTR	ip-2-30-72-178.dialup.ice.net
178.72.31.145	A	ip-145-31-72-178.dialup.ice.net