Robtex

Up: 72.30.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 72.30.128.0/18
Down right: 72.30.192.0/18
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.30.132.73	A	gi-0-6.bas1-1-con.ac2.yahoo.com
72.30.132.131	PTR	unknown-72-30-132-x.yahoo.com
72.30.134.169	A	oj6master.inktomisearch.com
72.30.138.200	A	hostmaster.thequeenmarysdarkharbor.com
72.30.142.222	A	llf531072.crawl.yahoo.net
72.30.180.40	A	cm.uk.independent.overture.com
72.30.180.40	A	cm.jp.overture.com
72.30.180.40	A	cm.ysm.yahoodns.net
72.30.185.2	A+PTR	ge-1-2-4.clr1.ac2.yahoo.com
72.30.185.75	A	vl-802.bas2-1-ysm.ac4.yahoo.com
72.30.185.244	A	bas3-1-yst.ac4.yahoo.com
72.30.185.249	A	bas2-1-ysm.ac4.yahoo.com
72.30.185.252	A	lo0.bas-f2.ac2.yahoo.com
72.30.186.0	PTR	unknown-72-30-186-x.yahoo.com
72.30.186.7	A	si-e1.vl220.ac2.yahoo.com
72.30.186.52	A	m2.search.vip.ac2.yahoo.com
72.30.187.99	A	m251.search.ac2.yahoo.com
72.30.190.0	PTR	unknown-72-30-190-x.yahoo.com
72.30.190.5	A	netscaler-f12-snip-v690.ac2.yahoo.com
72.30.190.12	A	netscalertest2.vip.ac2.yahoo.com
72.30.190.44	A	rc.us-west.srv.overture.com
72.30.190.44	A	any-rc.srv.ysm.yahoodns.net
72.30.190.128	PTR	unknown-72-30-190-x.yahoo.com
72.30.190.131	PTR	unknown-72-30-190-x.yahoo.com
72.30.190.131	A	vl340.bas-f2.ac2.yahoo.com
72.30.190.162	A	enom-dm.ysm.vip.ac2.yahoo.com
72.30.190.175	A	cm-1.espn.ysm.vip.ac2.yahoo.com
72.30.192.14	A	dmp5008.inktomisearch.com
72.30.192.129	PTR	unknown-72-30-192-x.yahoo.com
72.30.192.137	A	ha4-yst.dns.ac2.yahoo.com
72.30.192.154	A	ha7-mail.dns.ac4.yahoo.com
72.30.192.158	A	ha3-main.dns.ac4.yahoo.com
72.30.192.176	A	ha5-apx.dns.ac4.yahoo.com
72.30.196.1	PTR	unknown-72-30-196-x.yahoo.com
72.30.196.3	PTR	unknown-72-30-196-x.yahoo.com
72.30.196.42	A	preview.es.yahoo.com
72.30.196.80	A	sender4.onepush.mobile.bf1.yahoo.com
72.30.196.151	A	storage1-l3.flickr.vip.bf1.yahoo.com
72.30.196.151	A	farm1.hv-static.flickr.com
72.30.196.151	A	photos5.flickr.com
72.30.198.109	A	h384.hlfs.bf1.yahoo.com
72.30.198.116	A	farm8.staticflickr.com
72.30.198.116	A	storage8-l3.flickr.vip.bf1.yahoo.com
72.30.198.116	A	pxe-farm8.static.flickr.a00.yahoodns.net
72.30.198.135	A	mtaq1.groups.a03.yahoodns.net
72.30.198.210	A	alatheia.zenfs.com
72.30.198.210	A	ue11uw11.aa.zenfs.com
72.30.199.5	A	srv.perf.overture.com
72.30.199.5	A	any-srvov.ysm.yahoodns.net
72.30.199.82	A	www300.flickr.bf1.yahoo.com
72.30.199.214	A	ws159.progrss.bf1.yahoo.com
72.30.199.216	A	ws155.progrss.bf1.yahoo.com
72.30.199.228	A	ws124.progrss.bf1.yahoo.com
72.30.199.229	A	ws125.progrss.bf1.yahoo.com
72.30.202.0	PTR	unknown-72-30-202-x.yahoo.com
72.30.202.1	PTR	unknown-72-30-202-x.yahoo.com
72.30.202.3	PTR	vl-122.bas1-11-prd.bf1.yahoo.com
72.30.202.11	A	ve122.slb7-11-prd.bf1.yahoo.com
72.30.202.33	A	pprd3-node227-lh2.manhattan.bf1.yahoo.com
72.30.202.43	A	api-w1.carmot.cp.vip.bf1.yahoo.com
72.30.202.44	A	pprd3-node230-lh1.manhattan.bf1.yahoo.com
72.30.202.134	A	appstatus-vip.cc.vip.bf1.yahoo.com
72.30.202.134	A	help-appsstatus.cc.a03.yahoodns.net
72.30.202.137	A	any-fam.data.fy2.b.yahoo.com
72.30.202.137	A	b4.data.vip.bf1.yahoo.com
72.30.202.138	A	any-fam.data.fy2.b.yahoo.com
72.30.202.247	A	photos5.flickr.com
72.30.203.0	PTR	unknown-72-30-203-x.yahoo.com
72.30.203.2	PTR	ha2.ge-0-45.bas-c.ac2.yahoo.com
72.30.203.4	A	sarniafriendshipcentreyahoo.com
72.30.203.4	A	yahoo-es.de
72.30.203.4	A	golffantasysportsyahoo.com
72.30.203.138	A	pr85.comet.bf1.yahoo.com
72.30.203.151	A	zt33256.ostk.bm2.prod.bf1.yahoo.com
72.30.203.156	A	pprd3-node206-lh1.manhattan.bf1.yahoo.com
72.30.203.173	A	pprd3-node222-lh2.manhattan.bf1.yahoo.com
72.30.208.1	PTR	unknown-72-30-208-x.yahoo.com
72.30.208.128	PTR	unknown-72-30-208-x.yahoo.com
72.30.211.202	A	b.dp.yieldmanager.net
72.30.211.203	A	b.dp.yieldmanager.net
72.30.214.71	A	ha7.gi-1-31.bas-1-con.ac2.yahoo.com
72.30.214.73	A	gi-1-31.bas1-1-con.ac2.yahoo.com
72.30.214.129	A	ha1.gi-1-30.bas-1-con.ac2.yahoo.com
72.30.214.130	PTR	unknown-72-30-214-x.yahoo.com
72.30.214.131	A	ha3.gi-1-30.bas-1-con.ac2.yahoo.com
72.30.214.136	A	ha8.gi-1-30.bas-1-con.ac2.yahoo.com
72.30.215.122	A	lt501015.inktomisearch.com
72.30.215.123	A	lt501014.inktomisearch.com
72.30.215.124	A	lt501013.inktomisearch.com
72.30.215.173	A	lt501012.inktomisearch.com
72.30.215.174	A	lt501011.inktomisearch.com
72.30.215.175	A	lt501010.inktomisearch.com
72.30.215.176	A	lt501009.inktomisearch.com
72.30.216.69	A	ha5.ge-13-39.bas-1-con.ac2.yahoo.com
72.30.220.1	PTR	unknown-72-30-220-x.yahoo.com
72.30.220.232	A	a1.dns.atz.yahoo.com
72.30.222.69	A	ha5.ge-4-1.bas-1-con.ac2.yahoo.com
72.30.222.76	A	ge-4-1.bas4-1-con.ac2.yahoo.com
72.30.225.3	A	ha3.ge-12-5.bas-1-con.ac2.yahoo.com
72.30.226.8	A	ha8.ge-12-1.bas-1-con.ac2.yahoo.com
72.30.226.9	A	ge-12-1.bas1-1-con.ac2.yahoo.com
72.30.226.74	A	ge-13-0.bas2-1-con.ac2.yahoo.com
72.30.227.4	A	ha4.ge-13-34.bas-1-con.ac2.yahoo.com
72.30.229.135	A	ha7.ge-13-24.bas-1-con.ac2.yahoo.com
72.30.229.201	A	ge-13-23.bas1-1-con.ac2.yahoo.com
72.30.230.98	A	rdre1.inktomi.com
72.30.230.98	A	rdre1-e662.inktomi.com
72.30.230.98	A	rdre1.yahoo.com
72.30.230.99	A	rdre1.inktomi.com
72.30.230.99	A	rdre1.yahoo.com
72.30.230.99	A	rdre1-e663.inktomi.com
72.30.231.0	PTR	unknown-72-30-231-x.yahoo.com
72.30.231.154	A	idpproxy-bling2-e79a.idp.inktomisearch.com
72.30.231.164	A	idpproxy-bling2-e7a4.idp.inktomisearch.com
72.30.231.251	A	dnsac2-e7fb.inktomisearch.com
72.30.233.94	A	slb4-6-prd.bf1.yahoo.com
72.30.234.37	A	mta1332.mail.bf1.yahoo.com
72.30.234.44	A	mta1339.mail.bf1.yahoo.com
72.30.234.49	A	mta1344.mail.bf1.yahoo.com
72.30.234.50	A	mta1345.mail.bf1.yahoo.com
72.30.234.134	A	n7-vm8.bullet.mail.bf1.yahoo.com
72.30.234.135	A	n7-vm9.bullet.mail.bf1.yahoo.com
72.30.234.143	A	mg114.mail.bf1.yahoo.com
72.30.234.146	A	n8-vm7.bullet.mail.bf1.yahoo.com
72.30.235.1	A+PTR	n8-vm4.bullet.mail.bf1.yahoo.com
72.30.235.2	A+PTR	n8-vm5.bullet.mail.bf1.yahoo.com
72.30.235.3	A+PTR	n8-vm6.bullet.mail.bf1.yahoo.com
72.30.235.5	A	mg119.mail.bf1.yahoo.com
72.30.235.128	A+PTR	n7-vm4.bullet.mail.bf1.yahoo.com
72.30.235.129	A+PTR	n7-vm5.bullet.mail.bf1.yahoo.com
72.30.235.130	A+PTR	n7-vm6.bullet.mail.bf1.yahoo.com
72.30.235.131	A+PTR	n7-vm7.bullet.mail.bf1.yahoo.com
72.30.236.15	A	comfortlivingdesign.com
72.30.237.128	A	ls10210.mail.bf1.yahoo.com
72.30.238.72	A	nm35-vm0.bullet.mail.bf1.yahoo.com
72.30.238.74	A	nm35-vm2.bullet.mail.bf1.yahoo.com
72.30.238.75	A	nm35-vm3.bullet.mail.bf1.yahoo.com
72.30.238.77	A	nm35-vm5.bullet.mail.bf1.yahoo.com
72.30.238.133	A	nm33.bullet.mail.bf1.yahoo.com
72.30.238.138	A	nm36-vm2.bullet.mail.bf1.yahoo.com
72.30.238.142	A	nm36-vm6.bullet.mail.bf1.yahoo.com
72.30.238.201	A	nm37-vm1.bullet.mail.bf1.yahoo.com
72.30.239.3	A	ls102122.mail.bf1.yahoo.com
72.30.239.5	A	nm36.bullet.mail.bf1.yahoo.com
72.30.239.6	A	nm34-vm8.bullet.mail.bf1.yahoo.com
72.30.239.9	A	nm31-vm1.bullet.mail.bf1.yahoo.com
72.30.239.135	A	nm31-vm9.bullet.mail.bf1.yahoo.com
72.30.239.138	A	nm32-vm2.bullet.mail.bf1.yahoo.com
72.30.239.145	A	nm39-vm1.bullet.mail.bf1.yahoo.com
72.30.239.147	A	nm39-vm3.bullet.mail.bf1.yahoo.com
72.30.240.0	PTR	unknown-72-30-240-x.yahoo.com
72.30.240.128	PTR	unknown-72-30-240-x.yahoo.com
72.30.241.0	PTR	unknown-72-30-241-x.yahoo.com
72.30.241.121	A	gssp214n38.ygrid.corp.sp1.yahoo.com
72.30.241.128	PTR	unknown-72-30-241-x.yahoo.com
72.30.242.30	A	gssp211n11.ygrid.corp.sp1.yahoo.com
72.30.243.244	A	gssp204n33.ygrid.corp.sp1.yahoo.com
72.30.255.7	A	netscaler-f56-snip-v310.ac2.yahoo.com