Robtex

Up: 221.121.128.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 221.121.160.0/20
Down right: 221.121.176.0/20

IP	Type	Hostname
221.121.160.216	PTR	216.160.121.221.ap.seikyou.ne.jp
221.121.162.104	PTR	104.162.121.221.ap.kagoya.net
221.121.164.222	A+PTR	222.164.121.221.ap.seikyou.ne.jp
221.121.164.224	PTR	224.164.121.221.ap.seikyou.ne.jp
221.121.164.224	A	*.ruirui.jp
221.121.164.224	A	ruirui.jp
221.121.166.16	A+PTR	16.166.121.221.ap.yournet.ne.jp
221.121.178.150	A	pd131-150.valley.ne.jp
221.121.181.54	A+PTR	pd134-054.valley.ne.jp
221.121.181.144	A	mail.pj-b.net
221.121.181.144	A	pj-b.net
221.121.181.205	A+PTR	pd134-205.valley.ne.jp
221.121.181.227	A+PTR	pd134-227.valley.ne.jp
221.121.182.1	A+PTR	pd135-001.valley.ne.jp
221.121.182.4	A+PTR	pd135-004.valley.ne.jp
221.121.182.6	A	pd135-006.valley.ne.jp
221.121.182.14	A	pd135-014.valley.ne.jp
221.121.182.37	A	pd135-037.valley.ne.jp
221.121.182.38	A	pd135-038.valley.ne.jp
221.121.182.40	A	pd135-040.valley.ne.jp
221.121.182.43	A	pd135-043.valley.ne.jp
221.121.182.64	A+PTR	pd135-064.valley.ne.jp
221.121.182.68	A	pd135-068.valley.ne.jp
221.121.182.72	A	pd135-072.valley.ne.jp
221.121.182.73	A	pd135-073.valley.ne.jp
221.121.182.102	A	pd135-102.valley.ne.jp
221.121.182.103	A	pd135-103.valley.ne.jp
221.121.182.109	A	pd135-109.valley.ne.jp
221.121.182.111	A	pd135-111.valley.ne.jp
221.121.182.129	A+PTR	pd135-129.valley.ne.jp
221.121.182.131	A+PTR	pd135-131.valley.ne.jp
221.121.182.132	A	pd135-132.valley.ne.jp
221.121.182.139	A	pd135-139.valley.ne.jp
221.121.182.177	A	pd135-177.valley.ne.jp
221.121.182.181	A	pd135-181.valley.ne.jp
221.121.182.183	A	pd135-183.valley.ne.jp
221.121.182.192	A+PTR	pd135-192.valley.ne.jp
221.121.182.197	A	pd135-197.valley.ne.jp
221.121.182.198	A	pd135-198.valley.ne.jp
221.121.182.206	A	pd135-206.valley.ne.jp
221.121.182.226	A+PTR	pd135-226.valley.ne.jp
221.121.182.230	A	pd135-230.valley.ne.jp
221.121.182.236	A	pd135-236.valley.ne.jp
221.121.182.238	A	pd135-238.valley.ne.jp
221.121.183.26	A	pd136-026.valley.ne.jp
221.121.183.50	PTR	ns.town.karuizawa.nagano.jp
221.121.183.50	A	kdns.town.karuizawa.nagano.jp
221.121.186.246	PTR	ns1.pinoycentral.com
221.121.187.4	A	absmnl01.abs-cbn.com
221.121.187.6	A	absmnl02.abs-cbn.com
221.121.187.7	A	absmnl12.abs-cbn.com
221.121.187.9	A+PTR	absmnl03.abs-cbn.com
221.121.187.36	A	doms.abs-cbn.com
221.121.187.40	A	mail.abs-cbn.com
221.121.187.42	A	kapamilya-hr.abs-cbn.com
221.121.187.50	A	eforms.abs-cbn.com
221.121.187.64	A	dtt.abs-cbn.com
221.121.187.69	PTR	ns1648.ztomy.com
221.121.187.69	A	abscpos.abs-cbn.com
221.121.187.71	PTR	ns1648.ztomy.com
221.121.187.87	PTR	ns1432.ztomy.com
221.121.187.87	A	abssbgvm01.abs-cbn.com
221.121.187.89	A	abssbgvm02.abs-cbn.com
221.121.187.100	A	absmnl10.abs-cbn.com
221.121.187.101	A	absmnl04.abs-cbn.com
221.121.187.102	A	notes.abs-cbn.com
221.121.187.132	A	abschat.abs-cbn.com
221.121.187.134	A	mail.abscbnmobile.com
221.121.187.148	A	dtt-sms.abs-cbn.com
221.121.187.156	A	absfasp.abs-cbn.com
221.121.187.200	PTR	ns1648.ztomy.com
221.121.187.200	A	hypebeast.abs-cbn.com
221.121.187.221	PTR	ns1648.ztomy.com
221.121.187.221	A	mxgtwy.abs-cbnmobile.com
221.121.187.237	A	kapamilyaserviceportal.abs-cbn.com
221.121.190.81	A	cloudmsngr.abs-cbn.com
221.121.190.101	A	click.b.abs-cbn.com
221.121.190.101	A	bcms.b.abs-cbn.com
221.121.190.102	A	click.b.abs-cbn.com
221.121.190.102	A	bcms.b.abs-cbn.com
221.121.190.103	A	click.b.abs-cbn.com
221.121.190.103	A	bcms.b.abs-cbn.com
221.121.191.246	PTR	ns1.abs-cbn.com