Robtex

Up: 98.139.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 98.139.24.0/22
Down right: 98.139.28.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
98.139.24.4	A	vacationwinners.com
98.139.24.196	A	vl-108-sec.bas2-1-prd.bf1.yahoo.com
98.139.25.73	PTR	ws1.ydn.vip.bf1.yahoo.com
98.139.25.73	A	ws1.ydn.a1.b.yahoo.com
98.139.25.73	A	developer.yahoo.net
98.139.25.166	A	sri189.media.search.bf1.yahoo.com
98.139.25.225	A+PTR	analyticsarchiveb2.ac.bf1.yahoo.com
98.139.25.233	PTR	unknown.yahoo.com
98.139.25.233	A	m.careers.yahoo.com
98.139.25.233	A	feglobalcareers.a03.yahoodns.net
98.139.28.139	A	ftps2.store.bf1.yahoo.com
98.139.28.140	A	coats.store.vip.bf1.yahoo.com
98.139.28.141	A	rats.store.vip.bf1.yahoo.com
98.139.28.141	A	img.store.yahoodns.net
98.139.28.144	PTR	unknown-98-139-28-x.yahoo.com
98.139.28.144	A	presalesats.sbs.g03.yahoodns.net
98.139.28.144	A	luminate.com
98.139.28.145	PTR	phtml3.store.vip.bf1.yahoo.com
98.139.30.24	PTR	unknown-98-139-30-x.yahoo.com
98.139.30.56	PTR	unknown-98-139-30-x.yahoo.com
98.139.30.80	PTR	unknown-98-139-30-x.yahoo.com
98.139.30.83	PTR	unknown-98-139-30-x.yahoo.com
98.139.30.99	PTR	unknown-98-139-30-x.yahoo.com
98.139.30.123	PTR	unknown-98-139-30-x.yahoo.com
98.139.30.130	PTR	unknown-98-139-30-x.yahoo.com
98.139.30.144	PTR	unknown-98-139-30-x.yahoo.com
98.139.30.178	PTR	unknown-98-139-30-x.yahoo.com
98.139.30.216	PTR	unknown-98-139-30-x.yahoo.com
98.139.30.236	A	node3.cbe.maktoob.bf1.yahoo.com
98.139.30.236	A	login.maktoob.com
98.139.30.248	PTR	unknown-98-139-30-x.yahoo.com
98.139.31.193	A	fan162.sports.bf1.yahoo.com
98.139.31.235	A	fan148.sports.bf1.yahoo.com