Robtex

Up: 121.50.56.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 121.50.56.0/23
Down right: 121.50.58.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
121.50.56.14	A+PTR	mrbm13.mrs.mpub.ne.jp
121.50.56.62	A+PTR	mrbm-12-3.mrs.mpub.ne.jp
121.50.57.1	A	kids.tokyo-shoseki.co.jp
121.50.57.2	A	touken.tokyo-shoseki.co.jp
121.50.57.3	A	estate.tokyo-shoseki.co.jp
121.50.57.12	A	www.tosho-bunko.jp
121.50.57.14	A	tablet.tokyo-shoseki.co.jp
121.50.57.17	A	dns1.mondb.jp
121.50.57.17	A	dns1.tokyo-shoseki.co.jp
121.50.57.17	A	dns1.nihongokentei.jp
121.50.57.20	A	gate6.nihongokentei.jp
121.50.57.20	A	gate6.tokyo-shoseki.co.jp
121.50.57.39	A	e-learning.tokyo-shoseki.co.jp
121.50.57.44	A	mondb.tokyo-shoseki.co.jp
121.50.57.45	A	taiken.tokyo-shoseki.co.jp
121.50.57.138	A	dih-nc.e-kakushin.com
121.50.57.139	A	pcsafety.secomtrust.net
121.50.57.142	A	ds-nc.e-kakushin.com
121.50.57.149	A	www.ekoufu.jp
121.50.57.156	A	dac.e-kakushin.com
121.50.57.199	A	www.secom-anshin.jp
121.50.57.200	A+PTR	www.secom-anshin.jp
121.50.57.208	A	vr01bluerac.secom-anshin.jp
121.50.57.212	A	www2.e-kakushin.com
121.50.57.222	A	www9.e-kakushin.com
121.50.57.239	A	www9.e-kakushin.com
121.50.57.252	A	e-learning.e-kakushin.com
121.50.58.14	A+PTR	crnt.e-kakushin.com
121.50.58.21	A	kansei.e-kakushin.com
121.50.58.72	A+PTR	epk.e-kakushin.com
121.50.58.73	A	epw.e-kakushin.com
121.50.58.75	A	ca.e-kakushin.com
121.50.58.75	A	pa.e-kakushin.com
121.50.58.88	A+PTR	www1.e-kakushin.com
121.50.58.89	A	mnge.e-kakushin.com
121.50.58.119	A	epa.e-kakushin.com
121.50.58.135	A	www.kaboo.co.jp
121.50.58.136	A	mobile.kaboo.co.jp
121.50.58.142	PTR	121-50-58-142.secomtrust.net
121.50.58.142	A	www.saigaishienjutaku.com
121.50.58.146	PTR	121-50-58-146.secomtrust.net
121.50.58.147	PTR	121-50-58-147.secomtrust.net
121.50.58.148	PTR	121-50-58-148.secomtrust.net
121.50.58.152	PTR	121-50-58-152.secomtrust.net
121.50.58.153	PTR	121-50-58-153.secomtrust.net
121.50.58.153	A	enetcom.co.jp
121.50.58.153	A	ns01.enetcom.co.jp
121.50.58.175	PTR	121-50-58-175.secomtrust.net
121.50.58.175	A	www.meigin.com
121.50.58.176	PTR	121-50-58-176.secomtrust.net
121.50.58.176	A	www.meigin.com
121.50.58.177	PTR	121-50-58-177.secomtrust.net
121.50.58.177	A	www.secomtrust.net
121.50.58.215	PTR	121-50-58-215.secomtrust.net
121.50.58.215	A	hlo.tohotheater.jp
121.50.58.218	PTR	121-50-58-218.secomtrust.net
121.50.58.218	A	tcit.jp
121.50.58.225	PTR	121-50-58-225.secomtrust.net
121.50.58.225	A	www.tohotheater.jp
121.50.58.229	A	www.cinemafrontier.net
121.50.58.229	A	www11.cinemafrontier.net
121.50.58.229	A	cinemafrontier.net
121.50.58.236	PTR	121-50-58-236.secomtrust.net
121.50.58.240	A+PTR	web3.hs-sonpo.co.jp
121.50.58.240	A	web.hs-sonpo.co.jp
121.50.58.255	PTR	121-50-58-255.secomtrust.net
121.50.59.0	PTR	121-50-59-0.secomtrust.net
121.50.59.1	A	121-50-59-1.secomtrust.net
121.50.59.9	A	121-50-59-9.secomtrust.net
121.50.59.14	A+PTR	121-50-59-14.secomtrust.net
121.50.59.16	A+PTR	121-50-59-16.secomtrust.net
121.50.59.16	A	traders.co.jp
121.50.59.16	A	www.traders.co.jp
121.50.59.20	PTR	121-50-59-20.secomtrust.net
121.50.59.20	A	www.juroku.co.jp
121.50.59.20	A	www.16dc.co.jp
121.50.59.22	A+PTR	121-50-59-22.secomtrust.net
121.50.59.22	A	aozorabank.co.jp
121.50.59.41	A	www.takken-fk.co.jp
121.50.59.42	A	121-50-59-42.secomtrust.net
121.50.59.46	A	121-50-59-46.secomtrust.net
121.50.59.47	A	121-50-59-47.secomtrust.net
121.50.59.48	A	121-50-59-48.secomtrust.net
121.50.59.49	A	121-50-59-49.secomtrust.net
121.50.59.51	A+PTR	121-50-59-51.secomtrust.net
121.50.59.52	PTR	121-50-59-52.secomtrust.net
121.50.59.52	A	edic-center.net
121.50.59.53	A	121-50-59-53.secomtrust.net
121.50.59.55	PTR	121-50-59-55.secomtrust.net
121.50.59.55	A	stsp.jp
121.50.59.59	A	chikakukabin.jp
121.50.59.60	A+PTR	121-50-59-60.secomtrust.net
121.50.59.60	A	shumitect.jp
121.50.59.60	A	www.shumitect.jp
121.50.59.74	A+PTR	121-50-59-74.secomtrust.net
121.50.59.74	A	svenson.co.jp
121.50.59.78	A	121-50-59-78.secomtrust.net
121.50.59.96	A	smtp.mens-medical.net
121.50.59.98	PTR	121-50-59-98.secomtrust.net
121.50.59.98	A	mens-enkei.net
121.50.59.98	A	smtp.mens-enkei.net
121.50.59.102	PTR	121-50-59-102.secomtrust.net
121.50.59.102	A	katsura-ladys.com
121.50.59.106	A+PTR	121-50-59-106.secomtrust.net
121.50.59.106	A	www.ladys-svenson.com
121.50.59.106	A	ladys-svenson.com
121.50.59.111	A+PTR	121-50-59-111.secomtrust.net
121.50.59.111	A	maruishi-pharm.co.jp
121.50.59.118	A+PTR	121-50-59-118.secomtrust.net
121.50.59.130	A+PTR	121-50-59-130.secomtrust.net
121.50.59.130	A	traderswebfx.jp
121.50.59.131	A	121-50-59-131.secomtrust.net
121.50.59.140	A+PTR	121-50-59-140.secomtrust.net
121.50.59.175	A+PTR	ksdc3340-storemta.secomtrust.net
121.50.59.190	A	121-50-59-190.secomtrust.net
121.50.59.196	A+PTR	121-50-59-196.secomtrust.net
121.50.59.197	A	121-50-59-197.secomtrust.net
121.50.59.198	A	121-50-59-198.secomtrust.net
121.50.59.201	PTR	www201.jcs-gifu.co.jp
121.50.59.213	PTR	121-50-59-213.secomtrust.net
121.50.59.213	A	www.nochu-info.co.jp
121.50.59.214	A+PTR	nochu-info-spc.nochu-info.co.jp
121.50.59.244	A	121-50-59-244.secomtrust.net
121.50.59.253	A	121-50-59-253.secomtrust.net
121.50.59.254	A	121-50-59-254.secomtrust.net
121.50.59.255	PTR	121-50-59-255.secomtrust.net