Robtex

Up: 117.4.192.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 117.4.208.0/21
Down right: 117.4.216.0/21

IP	Type	Hostname
117.4.208.82	PTR	localhost
117.4.210.241	PTR	localhost
117.4.211.51	PTR	localhost
117.4.211.240	PTR	localhost
117.4.211.242	PTR	localhost
117.4.212.32	PTR	localhost
117.4.212.225	PTR	localhost
117.4.212.242	PTR	localhost
117.4.213.2	PTR	localhost
117.4.213.49	PTR	localhost
117.4.213.194	PTR	localhost
117.4.214.115	PTR	localhost
117.4.214.128	PTR	localhost
117.4.216.33	PTR	localhost
117.4.216.64	PTR	localhost
117.4.216.211	PTR	localhost
117.4.216.227	PTR	localhost
117.4.217.64	PTR	localhost
117.4.217.83	PTR	localhost
117.4.217.179	PTR	localhost
117.4.218.49	PTR	localhost
117.4.218.130	PTR	localhost
117.4.218.225	PTR	localhost
117.4.220.84	A	pgddienbiendong.edu.vn
117.4.220.115	PTR	localhost
117.4.222.49	PTR	localhost
117.4.222.64	PTR	localhost
117.4.222.194	PTR	localhost
117.4.222.208	PTR	localhost
117.4.222.240	PTR	localhost