Robtex

Up: 61.200.80.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 61.200.80.0/23
Down right: 61.200.82.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
61.200.80.1	A+PTR	a20.osakjp01.jp.ra.gin.ntt.net
61.200.80.114	A	osa-ca3.ntt.net
61.200.80.221	PTR	xe-0-0-7-1.a01.osakjp03.jp.bb.gin.ntt.net
61.200.80.221	A	ae-3-57.a20.osakjp01.jp.ra.gin.ntt.net
61.200.80.222	PTR	ae-3-57.a20.osakjp01.jp.ce.gin.ntt.net
61.200.81.81	A	drouter.daiwahouse.jp
61.200.81.82	A	dgw.daiwahouse.jp
61.200.81.83	A	dm.daiwahouse.jp
61.200.81.86	A	ac.daiwahouse.jp
61.200.81.111	A	asia3.akadns.net
61.200.81.112	A	n8cn.akastream.net
61.200.81.112	A	clns8.akamaiedge.net
61.200.81.112	A	clns8.akamaitech.net
61.200.81.116	A	lar5.akafms.net
61.200.81.116	A	lar5.akafcs.net
61.200.81.116	A	zb.akamaiedge.net
61.200.81.134	PTR	a61-200-81-134.deploy.akamaitechnologies.com
61.200.81.142	PTR	a61-200-81-142.deploy.akamaitechnologies.com
61.200.81.143	PTR	a61-200-81-143.deploy.akamaitechnologies.com
61.200.81.160	PTR	a61-200-81-160.deploy.akamaitechnologies.com
61.200.81.166	PTR	a61-200-81-166.deploy.akamaitechnologies.com
61.200.83.192	PTR	61-200-83-192.osa.jprs.co.jp
61.200.83.204	PTR	61-200-83-204.osa.jprs.co.jp
61.200.83.204	A	ns03.jprs.jp
61.200.83.204	A	ns3.registrar.jprs
61.200.83.228	A	b.ns.1.8.e164.arpa
61.200.83.244	A	dns3.jpdirect.jp
61.200.83.244	A	redirect3.jpdirect.jp
61.200.83.244	A	61-200-83-244.osaka.jprs.co.jp