Robtex

Up: 87.248.96.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 87.248.96.0/22
Down right: 87.248.100.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
87.248.96.0	PTR	unknown-87-248-96-x.yahoo.com
87.248.96.15	A	sync700139-2.mail.ir2.yahoo.com
87.248.96.80	A+PTR	yf7.corp.yahoo.com
87.248.96.249	A	tqa2.corp.ird.yahoo.com
87.248.97.6	A	dnsird.inktomisearch.com
87.248.97.133	A	gauge-ird-vip1.inktomisearch.com
87.248.97.211	PTR	unknown-87-248-97-x.yahoo.com
87.248.98.7	A	unbsd.com
87.248.98.7	A	atsv2-fp.wg1.b.yahoo.com
87.248.98.7	A	media-router-fp1.prod.media.wg1.b.yahoo.com
87.248.98.8	PTR	unknown.yahoo.com
87.248.98.8	A	unbsd.com
87.248.98.8	A	atsv2-fp.wg1.b.yahoo.com
87.248.98.203	A	fcore1-cp1.bkp.ir2.yahoo.com
87.248.98.205	A	archive-master1.bkp.ir2.yahoo.com
87.248.98.211	A+PTR	bal1.bkp.ir2.yahoo.com
87.248.98.212	A	fcore2.bkp.ir2.yahoo.com
87.248.98.215	A	acsls2.bkp.ir2.yahoo.com
87.248.99.125	A	er1042.yss.ird.yahoo.com
87.248.99.148	A	ed2012.yss.ird.yahoo.com
87.248.99.205	A	ed1096.yss.ird.yahoo.com
87.248.99.243	A	dip234.lsn.ir2.yahoo.com
87.248.100.0	PTR	unknown-87-248-100-x.yahoo.com
87.248.100.8	PTR	unknown-87-248-100-x.yahoo.com
87.248.100.26	PTR	unknown-87-248-100-x.yahoo.com
87.248.100.27	PTR	unknown-87-248-100-x.yahoo.com
87.248.100.34	PTR	unknown-87-248-100-x.yahoo.com
87.248.100.40	PTR	unknown-87-248-100-x.yahoo.com
87.248.100.58	PTR	unknown-87-248-100-x.yahoo.com
87.248.100.70	A	c4948-b11.ird.yahoo.com
87.248.100.71	A	c4948-b12.ird.yahoo.com
87.248.100.73	A+PTR	c4948-b14.ird.yahoo.com
87.248.100.74	PTR	c4948-b15.ird.yahoo.com
87.248.100.75	PTR	unknown-87-248-100-x.yahoo.com
87.248.100.75	A	c4948-b16.ird.yahoo.com
87.248.100.76	A	c4948-b17.ird.yahoo.com
87.248.100.112	PTR	unknown-87-248-100-x.yahoo.com
87.248.100.136	PTR	o1.ycpi.vip.ir2.yahoo.com
87.248.100.136	A	fd-geoycpi-uno.gycpi.b.yahoodns.net
87.248.100.136	A	ue-ycpi-shed-25.gycpi.b.yahoodns.net
87.248.100.137	PTR	o2.ycpi.vip.ir2.yahoo.com
87.248.100.137	A	fd-geoycpi-uno.gycpi.b.yahoodns.net
87.248.100.137	A	ue-ycpi-shed-25.gycpi.b.yahoodns.net
87.248.100.139	PTR	e1.ycpi.vip.ir2.yahoo.com
87.248.100.144	PTR	c4948-b85.ird.yahoo.com
87.248.100.145	PTR	unknown-87-248-100-x.yahoo.com
87.248.100.154	PTR	unknown-87-248-100-x.yahoo.com
87.248.100.154	A	c4948-b95.ird.yahoo.com
87.248.100.161	A	si-b1.ird.yahoo.com
87.248.100.168	A+PTR	media-router-apple71.prod.media.vip.ir2.yahoo.com
87.248.100.168	A	geo-applefinance-cache.internal.query.g03.yahoodns.net
87.248.100.169	PTR	c4948-b5.ird.yahoo.com
87.248.100.169	A	media-router-apple1.prod.media.vip.ir2.yahoo.com
87.248.100.174	A	c4948-b105.ird.yahoo.com
87.248.100.200	A+PTR	c4948-b131.ird.yahoo.com
87.248.100.200	A	geo-yql.g05.yahoodns.net
87.248.100.200	A	sports-graphite.g01.yahoodns.net
87.248.100.203	A+PTR	c4948-b134.ird.yahoo.com
87.248.100.208	A+PTR	c4948-b139.ird.yahoo.com
87.248.100.208	A	yho.com
87.248.100.208	A	yahoo.co.uk
87.248.100.209	PTR	c4948-b140.ird.yahoo.com
87.248.100.215	A	c4948-b146.ird.yahoo.com
87.248.100.216	PTR	c4948-b147.ird.yahoo.com
87.248.100.241	A	c4948-b172.ird.yahoo.com
87.248.101.0	PTR	unknown-87-248-101-x.yahoo.com
87.248.101.16	PTR	lo0.bas-b2.ird.yahoo.com
87.248.101.16	A	bas-b2.ird.yahoo.com
87.248.101.17	A	bas-b1.ird.yahoo.com
87.248.101.127	A	bas-d2.ird.yahoo.com
87.248.101.225	PTR	unknown-87-248-101-x.yahoo.com
87.248.101.225	A	bas-c2.ird.yahoo.com
87.248.102.0	PTR	unknown-87-248-102-x.yahoo.com
87.248.103.0	PTR	unknown-87-248-103-x.yahoo.com
87.248.103.17	PTR	unknown-87-248-103-x.yahoo.com
87.248.103.49	A	f1322.mail.vip.ird.yahoo.com
87.248.103.58	PTR	unknown-87-248-103-x.yahoo.com
87.248.103.58	A	web132215.mail.ird.yahoo.com