Robtex

Up: 98.137.200.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 98.137.204.0/23
Down right: 98.137.206.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
98.137.204.63	PTR	pprd3-rtryqlapple1.manhattan.vip.bf1.yahoo.com
98.137.204.63	A	any-apple-weather-yql.media.a04.yahoodns.net
98.137.204.63	A	content-syndication-yql.a03.yahoodns.net
98.137.204.66	A+PTR	hpto-001.adx.bf1.yahoo.com
98.137.204.66	A	hpto.yahoo.com
98.137.204.81	PTR	api1.member.vip.bf1.yahoo.com
98.137.204.81	A	api.reg.yahoo.com
98.137.204.81	A	api.reg.lga1.b.yahoo.com
98.137.204.87	PTR	unknown-98-137-204-x.yahoo.com
98.137.204.87	A	edit.member.lga1.b.yahoo.com
98.137.204.87	A	edit-global.lgg1.b.yahoo.com
98.137.204.89	PTR	unknown-98-137-204-x.yahoo.com
98.137.204.89	A	farm4.hv-static.flickr.com
98.137.204.89	A	pxe-farm4.static.flickr.a00.yahoodns.net
98.137.204.98	PTR	editin2.member.vip.bf1.yahoo.com
98.137.204.98	A	any.edit.india.a1.b.yahoo.com
98.137.204.99	A	kr.edit.yahoo.com
98.137.204.103	PTR	unknown-98-137-204-x.yahoo.com
98.137.204.103	A	us-weather.a05.yahoodns.net
98.137.204.103	A	weather.a05.yahoodns.net
98.137.204.111	PTR	gops.use103.mobstor.vip.bf1.yahoo.com
98.137.204.111	A	bcp-use103.zenfs.com
98.137.204.111	A	ue3uw3.aa.zenfs.com
98.137.204.240	A+PTR	gops.use105.mobstor.vip.bf1.yahoo.com
98.137.204.240	A	ds-ue105uw105.aa.mobstor.a01.yahoodns.net
98.137.204.240	A	mobiledl.zenfs.com
98.137.204.251	A+PTR	w1.lrs.vip.bf1.yahoo.com
98.137.205.0	PTR	unknown-98-137-205-x.yahoo.com
98.137.205.2	PTR	pushgw34.snp.mobile.bf1.yahoo.com
98.137.205.15	PTR	unknown-98-137-205-x.yahoo.com
98.137.205.15	A	gs.fp.wa1.b.yahoo.com
98.137.205.17	PTR	unknown-98-137-205-x.yahoo.com
98.137.205.18	PTR	unknown-98-137-205-x.yahoo.com
98.137.205.19	PTR	unknown-98-137-205-x.yahoo.com
98.137.205.23	PTR	unknown-98-137-205-x.yahoo.com
98.137.205.24	PTR	unknown-98-137-205-x.yahoo.com
98.137.205.69	A+PTR	gi-4-4.bas1-1-yst.ac4.yahoo.com
98.137.205.84	PTR	unknown-98-137-205-x.yahoo.com
98.137.205.90	PTR	unknown-98-137-205-x.yahoo.com
98.137.205.194	A	ha2.gi-4-2.bas-1-yst.ac4.yahoo.com
98.137.205.232	A+PTR	fe-a-l3.profile.vip.bf1.yahoo.com
98.137.205.232	A	profile.yahoo.com
98.137.205.233	PTR	unknown-98-137-205-x.yahoo.com
98.137.205.233	A	any-appleweather-cache.internal.query.a03.yahoodns.net
98.137.205.233	A	yts10.yql.vip.bf1.yahoo.com
98.137.205.234	PTR	unknown-98-137-205-x.yahoo.com
98.137.205.236	A+PTR	storage3-l3.flickr.vip.bf1.yahoo.com
98.137.205.236	A	farm3.static.flickr.com
98.137.205.236	A	farm3.static.flickr.g00.yahoodns.net
98.137.205.245	PTR	unknown-98-137-205-x.yahoo.com
98.137.205.245	A	ats.apple.yql.vip.bf1.yahoo.com
98.137.205.251	PTR	unknown-98-137-205-x.yahoo.com
98.137.205.255	PTR	unknown-98-137-205-x.yahoo.com
98.137.206.40	PTR	h198.hlfs.bf1.yahoo.com
98.137.206.118	PTR	h180.hlfs.bf1.yahoo.com
98.137.206.125	A	h187.hlfs.bf1.yahoo.com
98.137.206.162	A	holtworker112.flickr.bf1.yahoo.com
98.137.206.228	A	h131.hlfs.bf1.yahoo.com
98.137.207.4	A+PTR	4.207.137.98.aprez.ostk.prod.bf1.yahoo.com
98.137.207.5	A+PTR	5.207.137.98.aprez.ostk.prod.bf1.yahoo.com
98.137.207.6	A+PTR	6.207.137.98.aprez.ostk.prod.bf1.yahoo.com
98.137.207.10	A+PTR	1044991.ostk.bm2.prod.bf1.yahoo.com
98.137.207.10	A	ws176.socdir.bf1.yahoo.com
98.137.207.11	A+PTR	ws126.progrss.bf1.yahoo.com
98.137.207.12	A+PTR	uf1.toolbar.bf1.yahoo.com
98.137.207.22	PTR	h228.hlfs.bf1.yahoo.com
98.137.207.26	PTR	h232.hlfs.bf1.yahoo.com
98.137.207.28	A	h234.hlfs.bf1.yahoo.com
98.137.207.33	PTR	unknown-98-137-207-x.yahoo.com
98.137.207.36	PTR	unknown-98-137-207-x.yahoo.com
98.137.207.36	A	h068.llfs.bf1.yahoo.com
98.137.207.45	A	h077.llfs.bf1.yahoo.com
98.137.207.47	A	h079.llfs.bf1.yahoo.com
98.137.207.56	PTR	unknown-98-137-207-x.yahoo.com
98.137.207.60	A+PTR	1045653.ostk.bm2.prod.bf1.yahoo.com
98.137.207.60	A	ws178.socdir.bf1.yahoo.com
98.137.207.61	A+PTR	1044993.ostk.bm2.prod.bf1.yahoo.com
98.137.207.61	A	ws179.socdir.bf1.yahoo.com
98.137.207.73	A	h009.llfs.bf1.yahoo.com
98.137.207.76	A	76.207.137.98.aprez.ostk.prod.bf1.yahoo.com
98.137.207.78	A	h014.llfs.bf1.yahoo.com
98.137.207.83	A	h019.llfs.bf1.yahoo.com
98.137.207.97	PTR	unknown-98-137-207-x.yahoo.com
98.137.207.97	A	h033.llfs.bf1.yahoo.com
98.137.207.105	A	h041.llfs.bf1.yahoo.com
98.137.207.112	PTR	unknown-98-137-207-x.yahoo.com
98.137.207.118	A	h054.llfs.bf1.yahoo.com
98.137.207.127	PTR	unknown-98-137-207-x.yahoo.com
98.137.207.132	A	h004.hlfs.bf1.yahoo.com
98.137.207.140	PTR	h005-stg.llfs.bf1.yahoo.com
98.137.207.141	PTR	unknown-98-137-207-x.yahoo.com
98.137.207.145	A	h017.hlfs.bf1.yahoo.com
98.137.207.147	A	h019.hlfs.bf1.yahoo.com
98.137.207.166	PTR	h038.hlfs.bf1.yahoo.com
98.137.207.182	PTR	h054.hlfs.bf1.yahoo.com
98.137.207.187	A+PTR	h059.hlfs.bf1.yahoo.com
98.137.207.195	A+PTR	h067.hlfs.bf1.yahoo.com
98.137.207.222	A+PTR	h094.hlfs.bf1.yahoo.com
98.137.207.230	A+PTR	h102.hlfs.bf1.yahoo.com
98.137.207.231	A+PTR	h103.hlfs.bf1.yahoo.com
98.137.207.233	PTR	h105.hlfs.bf1.yahoo.com
98.137.207.237	PTR	h109.hlfs.bf1.yahoo.com
98.137.207.251	PTR	h123.hlfs.bf1.yahoo.com