Robtex

Up: 103.3.0.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 103.3.8.0/22
Down right: 103.3.12.0/22

IP	Type	Hostname
103.3.13.13	A	host013.eco-nc-1.stnet.ne.jp
103.3.13.20	A	host020.eco-nc-1.stnet.ne.jp
103.3.13.37	A	host037.eco-tk2-1.stnet.ne.jp
103.3.13.43	A+PTR	host043.eco-tk2-1.stnet.ne.jp
103.3.13.53	A	host053.eco-tk2-1.stnet.ne.jp
103.3.13.55	A	host055.eco-tk2-1.stnet.ne.jp
103.3.13.59	PTR	host059.eco-tk2-1.stnet.ne.jp
103.3.13.92	A	host092.eco-mt2-1.stnet.ne.jp
103.3.13.97	PTR	host097.eco-nis-1.stnet.ne.jp
103.3.13.122	A+PTR	host122.eco-nis-1.stnet.ne.jp
103.3.13.177	PTR	host177.eco-koc2-1.stnet.ne.jp