Robtex

Up: 72.30.0.0/17
Can't show all results, try to descend to a more specific CIDR
Down left: 72.30.0.0/19
Down right: 72.30.32.0/19
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.30.0.0	PTR	unknown-72-30-0-x.yahoo.com
72.30.0.2	PTR	xe-4-1-0.msr1.sk1.yahoo.com
72.30.0.16	A	ha20-mta.dns.bf1.yahoo.com
72.30.0.18	A	ha27-mta.dns.bf1.yahoo.com
72.30.0.72	A	ha2-crawl.dns.bf1.yahoo.com
72.30.0.73	A	ha3-crawl.dns.bf1.yahoo.com
72.30.0.74	A	ha4-crawl.dns.bf1.yahoo.com
72.30.0.75	A	ha5-crawl.dns.bf1.yahoo.com
72.30.0.128	PTR	ge-0-0-4.msr1.sk1.yahoo.com
72.30.0.130	PTR	ge-1-0-4.msr1.sk1.yahoo.com
72.30.0.192	PTR	unknown-72-30-0-x.yahoo.com
72.30.0.193	PTR	unknown-72-30-0-x.yahoo.com
72.30.0.239	A	lo0.bas-f1.sk1.yahoo.com
72.30.0.250	A	lo0.msr1.sk1.yahoo.com
72.30.0.251	A	lo0.msr2.sk1.yahoo.com
72.30.1.1	PTR	unknown-72-30-1-x.yahoo.com
72.30.1.3	PTR	gi-2-2.bas-a1.sk1.yahoo.com
72.30.1.193	PTR	unknown-72-30-1-x.yahoo.com
72.30.2.0	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.1	PTR	ha1.vl-121.usw1-8-pda.bf1.yahoo.com
72.30.2.2	A	ha2.vl-121.usw1-8-pda.bf1.yahoo.com
72.30.2.3	PTR	vl-121.usw1-8-pda.bf1.yahoo.com
72.30.2.3	A	vl-828.bas-k1.sk1.yahoo.com
72.30.2.16	A	r0-828.dns.sk1.yahoo.com
72.30.2.17	A	r1-828.dns.sk1.yahoo.com
72.30.2.64	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.69	A	gnhost.oss.search.vip.sk1.yahoo.com
72.30.2.72	A	fedata.oss.search.vip.sk1.yahoo.com
72.30.2.73	A	mt.oss.search.vip.sk1.yahoo.com
72.30.2.74	A	ats1.apple-finance.yql.vip.bf1.yahoo.com
72.30.2.128	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.129	PTR	unknown.yahoo.com
72.30.2.129	A	secure1.fp.vip.sk1.yahoo.com
72.30.2.130	PTR	unknown.yahoo.com
72.30.2.130	A	ydb1.sg1.blog.vip.sk1.yahoo.com
72.30.2.131	A+PTR	shared04-vm5.qa.ypost.sk1.yahoo.com
72.30.2.134	A	coolpreviews.com
72.30.2.192	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.194	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.195	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.199	A	gossip2.search.vip.sk1.yahoo.com
72.30.2.204	A	thm01.image.search.vip.sk1.yahoo.com
72.30.2.207	A	thm04.image.search.vip.sk1.yahoo.com
72.30.2.216	A	thm13.image.search.vip.sk1.yahoo.com
72.30.3.5	A	vl-121.slb5-67-pda.bf1.yahoo.com
72.30.3.10	A	media-router-flurry7.prod.media.wg1.b.yahoo.com
72.30.3.10	A	media-router-flurry1.prod.media.wg1.b.yahoo.com
72.30.3.10	A	media-router-flurry1.prod.media.vip.bf1.yahoo.com
72.30.3.80	A	ue1.health.flickr.g00.yahoodns.net
72.30.3.80	A	ue-ycpi-shed-25.gycpi.b.yahoodns.net
72.30.3.80	A	ai.external.g03.yahoodns.net
72.30.3.163	A	rtc2204.ls.sk1.yahoo.com
72.30.9.225	A	fan-draft146.sports.bf1.yahoo.com
72.30.9.230	A	fan-draft104.sports.bf1.yahoo.com
72.30.9.230	A	fan-draft104-east.stream.sports.yahoo.com
72.30.9.232	A	fan-draft148.sports.bf1.yahoo.com
72.30.10.66	PTR	unknown-72-30-10-x.yahoo.com
72.30.10.67	PTR	unknown-72-30-10-x.yahoo.com
72.30.10.67	A	loadfb2.bkln.sk1.yahoo.com
72.30.10.98	A	fan-draft189.sports.bf1.yahoo.com
72.30.10.100	A	fan-draft185.sports.bf1.yahoo.com
72.30.10.160	A	fan-draft186.sports.bf1.yahoo.com
72.30.10.218	A	ics.calendar.yahoo.com
72.30.10.218	A	zcs1.cal.vip.sk1.yahoo.com
72.30.11.187	A	ssl-img.a00.yahoodns.net
72.30.11.242	A	sonictest-242.mail.bf1.yahoo.com
72.30.11.242	A	a323.yahoofs.a00.yahoodns.net
72.30.11.242	A	f32.ymdb.vip.sk1.yahoo.com
72.30.12.27	A	r3-f.bpk.dns.sk1.yahoo.com
72.30.12.31	A	fe1.yosup.g1.b.yahoo.com
72.30.12.32	A	img.thumbnails.g00.yahoodns.net
72.30.12.32	A	any-img.thumbnails.a00.yahoodns.net
72.30.12.175	A	rtc1310.ls.sk1.yahoo.com
72.30.13.204	A	srd-new.yahoo.com
72.30.13.205	A	srd-new.yahoo.com
72.30.13.206	A	srd-new.yahoo.com
72.30.13.206	A	devnull.yahoo.com
72.30.14.0	PTR	unknown-72-30-14-x.yahoo.com
72.30.14.11	A	b167.crawl.yahoo.net
72.30.14.64	A+PTR	b101.crawl.yahoo.net
72.30.14.65	A+PTR	b102.crawl.yahoo.net
72.30.14.67	PTR	f36.ymdb.vip.sk1.yahoo.com
72.30.14.68	A	b105.crawl.yahoo.net
72.30.14.69	A	b106.crawl.yahoo.net
72.30.14.129	A+PTR	ha1.vl-211.bas-1-flk.bf1.yahoo.com
72.30.14.130	A+PTR	ha2.vl-211.bas-1-flk.bf1.yahoo.com
72.30.14.131	A+PTR	vl-211.bas1-1-flk.bf1.yahoo.com
72.30.14.194	PTR	unknown-72-30-14-x.yahoo.com
72.30.16.157	A	sync400008-1.mail.bf1.yahoo.com
72.30.17.41	A	sync400079-2.mail.bf1.yahoo.com
72.30.17.101	A	idpproxy-dmsw1-4765.idp.inktomisearch.com
72.30.21.35	A	sk1ugadm1002.yst.yahoo.net
72.30.21.49	A	ug359702.yst.yahoo.net
72.30.21.60	A	ug317023.yst.yahoo.net
72.30.21.71	A	r301001.inktomisearch.com
72.30.21.100	A	ldbdev1.inktomisearch.com
72.30.21.102	A	r301002.inktomisearch.com
72.30.21.117	A	urldb1000vip.inktomisearch.com
72.30.21.128	PTR	unknown-72-30-21-x.yahoo.com
72.30.21.157	A	httpproxy-sk1.idp.inktomisearch.com
72.30.21.158	A	httpproxy-sk1.idp.inktomisearch.com
72.30.21.159	A	httpproxy-sk1.idp.inktomisearch.com
72.30.21.192	PTR	unknown-72-30-21-x.yahoo.com
72.30.22.3	A+PTR	po7-fab2-1-gdc.bf1.yahoo.com
72.30.22.36	A	ae10.clr2-a-gdc.bf1.yahoo.com
72.30.22.232	A	athens.zts.g04.yahoodns.net
72.30.24.1	A	lo0.egr2-2-pdb.bf1.yahoo.com
72.30.24.2	A	lo0.egr3-3-pdb.bf1.yahoo.com
72.30.24.9	A	lo0.usw2-10-pdb.bf1.yahoo.com
72.30.24.90	A	lo0.tor31-91-pdb.bf1.yahoo.com
72.30.24.112	A	lo0.tor55-113-pdb.bf1.yahoo.com
72.30.24.139	A	lo0.tor82-140-pdb.bf1.yahoo.com
72.30.24.188	A	lo0.tor133-189-pdb.bf1.yahoo.com
72.30.25.11	A	lo0.tor216-268-pdb.bf1.yahoo.com
72.30.25.41	A	lo0.tor247-298-pdb.bf1.yahoo.com
72.30.25.45	A	lo0.tor251-302-pdb.bf1.yahoo.com
72.30.25.65	A	lo0.tor284-322-pdb.bf1.yahoo.com
72.30.25.86	A	lo0.tor306-343-pdb.bf1.yahoo.com
72.30.25.110	A	lo0.tor329-367-pdb.bf1.yahoo.com
72.30.25.127	A	lo0.tor347-384-pdb.bf1.yahoo.com
72.30.25.180	A	lo0.tor383-437-pdb.bf1.yahoo.com
72.30.27.1	A	dns1.aol.com
72.30.28.0	PTR	unknown-72-30-28-x.yahoo.com
72.30.28.29	A	bf1liveint02.atlas.cdn.bf1.yahoo.com
72.30.28.37	A	smtp418.mail.bf1.yahoo.com
72.30.28.47	A	smtp421.mail.bf1.yahoo.com
72.30.28.48	A	smtpgate102.mob.mail.bf1.yahoo.com
72.30.28.108	A	bf1liveint01.atlas.cdn.bf1.yahoo.com
72.30.28.110	A	smtpgate101.mob.mail.bf1.yahoo.com
72.30.28.112	A	smtp417.mail.bf1.yahoo.com
72.30.28.114	A	smtp419.mail.bf1.yahoo.com
72.30.28.128	PTR	unknown-72-30-28-x.yahoo.com
72.30.28.129	PTR	vl-120.tor41-45-pda.bf1.yahoo.com
72.30.28.130	A+PTR	yadbuilder1.prod.manhattan.bf1.yahoo.com
72.30.28.131	PTR	iab0402410000.ostk.bm.bf1.yahoo.com
72.30.28.137	A	137.28.30.72.aprez.ostk.prod.bf1.yahoo.com
72.30.28.138	A	138.28.30.72.aprez.ostk.prod.bf1.yahoo.com
72.30.28.141	A	141.28.30.72.aprez.ostk.prod.bf1.yahoo.com
72.30.28.192	PTR	unknown-72-30-28-x.yahoo.com
72.30.28.193	A+PTR	vl-120.tor42-46-pda.bf1.yahoo.com
72.30.28.194	PTR	860998.ostk.bm1.prod.bf1.yahoo.com
72.30.28.195	PTR	633832.ostk.bm1.prod.bf1.yahoo.com
72.30.28.204	A	204.28.30.72.aprez.ostk.prod.bf1.yahoo.com
72.30.28.207	A	207.28.30.72.aprez.ostk.prod.bf1.yahoo.com
72.30.28.208	A	ats13.member.bf1.yahoo.com
72.30.29.162	A	fan-draft144.sports.bf1.yahoo.com
72.30.29.163	A	fan-draft125.sports.bf1.yahoo.com
72.30.29.164	A	fan-draft105.sports.bf1.yahoo.com
72.30.29.164	A	fan-draft105-east.stream.sports.yahoo.com
72.30.29.197	A	proxy1.yoscs.bf1.yahoo.com
72.30.30.14	A	q11.ycpi.bf1.yahoo.net
72.30.31.185	A	sync400036.mail.bf1.yahoo.com
72.30.32.0	PTR	te-8-3.bas-b1.sk1.yahoo.com
72.30.32.0	A	lo0.egr1-1-pdc.bf1.yahoo.com
72.30.32.1	A	lo0.egr2-2-pdc.bf1.yahoo.com
72.30.32.3	A	lo0.egr4-4-pdc.bf1.yahoo.com
72.30.32.4	A	lo0.usw1-5-pdc.bf1.yahoo.com
72.30.32.64	PTR	unknown-72-30-32-x.yahoo.com
72.30.32.68	A	c4948-e1.sk1.yahoo.com
72.30.32.72	A	lo0.tor32-73-pdc.bf1.yahoo.com
72.30.32.74	A	c4948-e7.sk1.yahoo.com
72.30.32.77	A	lo0.tor37-78-pdc.bf1.yahoo.com
72.30.32.128	PTR	unknown-72-30-32-x.yahoo.com
72.30.32.136	A	sk1-sbxarevfe-001.ysm.sk1.yahoo.com
72.30.32.142	A	sk1-sbxadservices-002.ysm.sk1.yahoo.com
72.30.32.145	A	sk1-sbxkwsrvcapi-002.ysm.sk1.yahoo.com
72.30.32.146	A	sk1-sbxam-001.ysm.sk1.yahoo.com
72.30.32.192	PTR	unknown-72-30-32-x.yahoo.com
72.30.32.218	A	lo0.tor187-219-pdc.bf1.yahoo.com
72.30.32.219	A	lo0.tor188-220-pdc.bf1.yahoo.com
72.30.32.226	A	lo0.tor194-227-pdc.bf1.yahoo.com
72.30.32.242	A	lo0.tor233-243-pdc.bf1.yahoo.com
72.30.33.10	A	lo0.tor224-267-pdc.bf1.yahoo.com
72.30.33.12	A	ctg-kingkong-service.ysm.vip.sk1.yahoo.com
72.30.33.15	A	xml.kr.yahoo-poptecl.ysm.vip.sk1.yahoo.com
72.30.33.19	A	arev.ysm.vip.sk1.yahoo.com
72.30.33.70	A	any-login.ysm.yahoodns.net
72.30.33.70	A	login.ysm.yahoodns.net
72.30.33.99	A	lo0.tor287-356-pdc.bf1.yahoo.com
72.30.33.101	A	rc.us-west.srv.overture.com
72.30.33.138	A	xml.uk.lycos.ysm.vip.sk1.yahoo.com
72.30.33.239	A	login14.ysm.vip.sk1.yahoo.com
72.30.33.246	A	loginauth.gysm.yahoodns.net
72.30.33.246	A	marketingsolutions.login.yahoo.com
72.30.33.246	A	any-loginauth.ysm.yahoodns.net
72.30.34.35	A	lo0.lef20-1-pdc.bf1.yahoo.com
72.30.34.93	A	lo0.lef14-2-pdc.bf1.yahoo.com
72.30.34.130	PTR	unknown-72-30-34-x.yahoo.com
72.30.34.149	A	et3.egr3-3-pdc.bf1.yahoo.com
72.30.35.2	PTR	ha2.vl-156.bas-1-flk.bf1.yahoo.com
72.30.35.3	A+PTR	vl-156.bas1-1-flk.bf1.yahoo.com
72.30.35.4	A	vl-156.bas2-1-flk.bf1.yahoo.com
72.30.35.6	A	vl-156.slb4-1-flk.bf1.yahoo.com
72.30.35.9	A	unbsd.com
72.30.35.10	A	unbsd.com
72.30.35.64	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.70	A	secops-rdp-01.ops.bf1.yahoo.com
72.30.35.81	A	ha1.vl-350.bas-1-flk.bf1.yahoo.com
72.30.35.82	A	vl-350.bas1-1-flk.bf1.yahoo.com
72.30.35.88	A	1.tandberg.pool.ntp.org
72.30.36.1	PTR	unknown-72-30-36-x.yahoo.com
72.30.36.52	A	gssp203n33.ygrid.corp.sp1.yahoo.com
72.30.36.54	A	prodtool.local.a03.yahoodns.net
72.30.36.160	A	gssp201n13.ygrid.corp.sp1.yahoo.com
72.30.37.130	PTR	unknown-72-30-37-x.yahoo.com
72.30.37.194	PTR	unknown-72-30-37-x.yahoo.com
72.30.38.1	PTR	unknown-72-30-38-x.yahoo.com
72.30.38.3	PTR	unknown-72-30-38-x.yahoo.com
72.30.38.42	A	w3.fp.sp2.yahoo.com
72.30.38.45	A	w6.fp.sp2.yahoo.com
72.30.38.46	A	w7.fp.sp2.yahoo.com
72.30.38.75	A	w31.fp.sp2.yahoo.com
72.30.38.77	A	w33.fp.sp2.yahoo.com
72.30.38.83	A	w39.fp.sp2.yahoo.com
72.30.38.100	A	w56.fp.sp2.yahoo.com
72.30.38.140	A	15m.yuhoo.nl
72.30.38.140	A	faculty.harvard1.net
72.30.38.140	A	maproconstructions.com
72.30.38.194	PTR	hsrp1.g-2-13.bas-b1.sk1.yahoo.com
72.30.38.195	PTR	g-2-13.bas-b1.sk1.yahoo.com
72.30.38.197	A	testservice1.psi.bf1.yahoo.com
72.30.38.230	A	ir9.fp.sp2.yahoo.com
72.30.38.233	A	ir12.fp.sp2.yahoo.com
72.30.39.69	A	rsw82-1-apx.sp2.yahoo.com
72.30.39.84	A	oxy-oxygen-481e2754.bf1.yahoo.com
72.30.39.103	A	sp2-soomon-001.adx.sp2.yahoo.com
72.30.39.195	PTR	unknown-72-30-39-x.yahoo.com
72.30.39.235	A	jagmyna312.adx.sp2.yahoo.com
72.30.41.1	PTR	unknown-72-30-41-x.yahoo.com
72.30.44.0	A	lo0.egr1-1-pdd.bf1.yahoo.com
72.30.44.3	A	lo0.egr4-4-pdd.bf1.yahoo.com
72.30.44.64	PTR	unknown-72-30-44-x.yahoo.com
72.30.44.131	PTR	unknown-72-30-44-x.yahoo.com
72.30.54.67	A+PTR	po-75.bas-b1.sk1.yahoo.com
72.30.60.2	PTR	unknown-72-30-60-x.yahoo.com
72.30.60.2	A	ha2.po-18.bas-d.sk1.yahoo.com
72.30.60.3	PTR	unknown-72-30-60-x.yahoo.com
72.30.60.65	PTR	unknown-72-30-60-x.yahoo.com
72.30.60.66	PTR	unknown-72-30-60-x.yahoo.com
72.30.60.77	A	ui-26.roles.bf1.yahoo.com
72.30.60.192	PTR	unknown-72-30-60-x.yahoo.com
72.30.60.194	PTR	unknown-72-30-60-x.yahoo.com
72.30.60.216	A	ui-05.roles.bf1.yahoo.com
72.30.62.85	A	pud5058.udb.bf1.yahoo.com
72.30.63.129	PTR	ha1.po-32.bas-d.sk1.yahoo.com
72.30.63.206	A	idx20.splunk.udb.bf1.yahoo.com