Robtex

Up: 72.30.2.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 72.30.2.0/26
Down right: 72.30.2.64/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
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
72.30.2.7	PTR	prod1remap.xobni.vip.bf1.yahoo.com
72.30.2.8	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.10	PTR	vl121.slb7-8-pda.bf1.yahoo.com
72.30.2.12	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.13	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.15	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.16	PTR	unknown.yahoo.com
72.30.2.16	A	r0-828.dns.sk1.yahoo.com
72.30.2.17	A+PTR	r1-828.dns.sk1.yahoo.com
72.30.2.18	A+PTR	r2-828.dns.sk1.yahoo.com
72.30.2.19	PTR	unknown.yahoo.com
72.30.2.19	A	r3-828.dns.sk1.yahoo.com
72.30.2.20	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.21	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.25	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.26	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.27	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.28	PTR	stag2.psearch.vip.bf1.yahoo.com
72.30.2.29	A+PTR	bingtest-fe.img.search.vip.sk1.yahoo.com
72.30.2.30	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.30	A	stage.seaview.search.vip.sk1.yahoo.com
72.30.2.31	A+PTR	seaview.search.vip.sk1.yahoo.com
72.30.2.32	A	ydb2.sg1.blog.vip.sk1.yahoo.com
72.30.2.33	PTR	unknown.yahoo.com
72.30.2.33	A	shared04-vm3.qa.ypost.sk1.yahoo.com
72.30.2.34	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.34	A	icebreaker-serve.vads.vip.bf1.yahoo.com
72.30.2.35	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.37	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.38	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.40	A+PTR	w1.fp.vip.sk1.yahoo.com
72.30.2.41	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.41	A	df1.fp.vip.sk1.yahoo.com
72.30.2.43	PTR	unknown.yahoo.com
72.30.2.43	A	ir1.fp.vip.sk1.yahoo.com
72.30.2.43	A	mail.39gam.com
72.30.2.45	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.47	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.49	A+PTR	prod.drupalsites.vip.bf1.yahoo.com
72.30.2.50	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.50	A	ir2.fp.vip.sk1.yahoo.com
72.30.2.51	A+PTR	ir3.fp.vip.sk1.yahoo.com
72.30.2.52	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.53	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.54	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.55	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.57	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.58	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.60	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.61	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.62	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.64	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.68	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.69	A	gnhost.oss.search.vip.sk1.yahoo.com
72.30.2.70	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.71	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.72	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.72	A	fedata.oss.search.vip.sk1.yahoo.com
72.30.2.73	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.73	A	mt.oss.search.vip.sk1.yahoo.com
72.30.2.74	A+PTR	ats1.apple-finance.yql.vip.bf1.yahoo.com
72.30.2.74	A	gnide.oss.search.vip.sk1.yahoo.com
72.30.2.74	A	any-applefinance-cache.internal.query.a03.yahoodns.net
72.30.2.75	A+PTR	prd1.gossip.search.vip.bf1.yahoo.com
72.30.2.75	A	any-sugg.search.ysta1.b.yahoo.com
72.30.2.75	A	sugg.search.ystg1.b.yahoo.com
72.30.2.76	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.78	A+PTR	smpn.sync.vip.bf1.yahoo.com
72.30.2.79	A+PTR	mqdb.oss.search.vip.sk1.yahoo.com
72.30.2.80	PTR	qrscl1.oss.search.vip.sk1.yahoo.com
72.30.2.81	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.82	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.82	A	l10nservice.vip.sk1.yahoo.com
72.30.2.83	A+PTR	mypop.search.vip.sk1.yahoo.com
72.30.2.84	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.86	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.87	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.88	PTR	unknown.yahoo.com
72.30.2.88	A	buzzmarketing.yahoo.com
72.30.2.88	A	bz.buzzmktg.vip.sk1.yahoo.com
72.30.2.89	PTR	unknown.yahoo.com
72.30.2.89	A	smpn.async.vip.bf1.yahoo.com
72.30.2.90	PTR	unknown.yahoo.com
72.30.2.90	A	a1.f901.ymdb.sk1.yahoo.com
72.30.2.91	A	a2.f901.ymdb.sk1.yahoo.com
72.30.2.92	A	testbed.mobstor.vip.sk1.yahoo.com
72.30.2.93	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.93	A	wsng2.rep.vip.sk1.yahoo.com
72.30.2.94	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.96	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.98	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.99	PTR	rtc2115.ls.sk1.yahoo.com
72.30.2.100	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.101	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.102	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.103	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.104	PTR	unknown.yahoo.com
72.30.2.104	A	shared04-vm4.qa.ypost.sk1.yahoo.com
72.30.2.106	PTR	beacon.vpg.vip.bf1.yahoo.com
72.30.2.106	A	beacon.vpg.g03.yahoodns.net
72.30.2.107	A+PTR	prod4cws1.xobni.vip.bf1.yahoo.com
72.30.2.107	A	any-prod4cws.xobni.a03.yahoodns.net
72.30.2.108	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.109	PTR	ycpproxy1.psi.vip.bf1.yahoo.com
72.30.2.109	A	yahoowallet.com
72.30.2.110	A	b1.f901.ymdb.sk1.yahoo.com
72.30.2.111	PTR	unknown.yahoo.com
72.30.2.111	A	b2.f901.ymdb.sk1.yahoo.com
72.30.2.112	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.112	A	edge.dist.g04.yahoodns.net
72.30.2.113	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.113	A	bouncer.gh.corp.yahoo.com
72.30.2.113	A	bouncer-os.gh.a02.yahoodns.net
72.30.2.114	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.115	PTR	unknown.yahoo.com
72.30.2.115	A	config.ydod6.vip.sk1.yahoo.com
72.30.2.119	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.122	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.123	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.124	PTR	unknown-72-30-2-x.yahoo.com
72.30.2.127	PTR	unknown-72-30-2-x.yahoo.com