Robtex

Up: 76.13.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 76.13.0.0/18
Down right: 76.13.64.0/18
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
76.13.0.0	PTR	unknown.yahoo.com
76.13.0.7	A	rsw5-2-flk.bf1.yahoo.com
76.13.0.248	A	bas-c2.ac4.yahoo.com
76.13.1.1	A	lo0.bas1-2-flk.bf1.yahoo.com
76.13.1.175	A	bas-g8.ac4.yahoo.com
76.13.1.189	A	bas2-1-yst.ac4.yahoo.com
76.13.2.0	PTR	unknown-76-13-2-x.yahoo.com
76.13.2.23	A	te-9-3.bas-f2.ac2.yahoo.com
76.13.6.31	A	bs2.ads.vip.ac4.yahoo.com
76.13.6.190	A	fe.secure.del.vip.ac4.yahoo.net
76.13.10.159	A	f6122.mail.vip.ac4.yahoo.com
76.13.10.237	A	f6123.mail.yahoo.com
76.13.10.237	A	f6123.mail.vip.ac4.yahoo.com
76.13.12.108	A	f594.mail.vip.ac4.yahoo.com
76.13.13.1	PTR	unknown-76-13-13-x.yahoo.com
76.13.13.72	A	n2b.bullet.mail.ac4.yahoo.com
76.13.13.75	A	n5b.bullet.mail.ac4.yahoo.com
76.13.13.77	A	n7b.bullet.mail.ac4.yahoo.com
76.13.13.78	A	n1c.bullet.mail.ac4.yahoo.com
76.13.13.144	A	spitfire.mail.yahoo.com
76.13.13.150	A	imap-us.mail.yahoo.com
76.13.13.246	A	smtp120.rog.mail.ac4.yahoo.com
76.13.15.1	PTR	unknown-76-13-15-x.yahoo.com
76.13.15.42	A	el111.msg.ac4.yahoo.com
76.13.15.46	A	el115.msg.ac4.yahoo.com
76.13.16.12	A	c4948-b3.ac4.yahoo.com
76.13.16.26	A	c4948-b13.ac4.yahoo.com
76.13.17.5	A	si-b1.vl220.ac4.yahoo.com
76.13.17.7	A	bw21.finance.ac4.yahoo.com
76.13.17.39	A	old.news.yahoo.com
76.13.17.39	A	api.news.yahoo.com
76.13.17.130	A+PTR	ct02.rm.ac4.yahoo.com
76.13.17.180	A	rptprod20.rm.ac4.yahoo.com
76.13.17.254	A	static.vap.yahoo.net
76.13.18.77	A	storage4-dsr.flickr.vip.ac4.yahoo.com
76.13.18.79	A	storage5.flickr.vip.ac4.yahoo.com
76.13.21.33	A	relay2.voice.ac4.yahoo.com
76.13.23.51	A	tax-evasion-bank-fraud.adrevolver.com
76.13.23.51	A	adrevolver.com
76.13.23.51	A	media-adrevolver.bl.vip.ac4.yahoo.net
76.13.26.127	A	sendmailws115.mail.bf1.yahoo.com
76.13.26.136	A	sendmailws131.mail.bf1.yahoo.com
76.13.26.172	A	mg1013.mail.bf1.yahoo.com
76.13.26.237	A	mg1046.mail.bf1.yahoo.com
76.13.27.6	A	sendmailws120.mail.bf1.yahoo.com
76.13.27.34	A	sendmailws127.mail.bf1.yahoo.com
76.13.27.35	A	sendmailws128.mail.bf1.yahoo.com
76.13.27.48	A	sendmailws133.mail.bf1.yahoo.com
76.13.27.132	A	sendmailws137.mail.bf1.yahoo.com
76.13.27.197	A	sendmailws140.mail.bf1.yahoo.com
76.13.28.0	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.1	A+PTR	ha1.vl-122.usw5-29-pdb.bf1.yahoo.com
76.13.28.3	A	vl-122.usw5-29-pdb.bf1.yahoo.com
76.13.28.4	A	vl-122.usw6-45-pdb.bf1.yahoo.com
76.13.28.7	A	media-router-flurry2.prod.media.wg1.b.yahoo.com
76.13.28.128	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.130	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.132	A	serf.ue.vip.bf1.yahoo.net
76.13.28.196	A	cooliris.com
76.13.28.196	A	emea.adspecs.yahoo.com
76.13.28.196	A	prod-intels-myc.g03.yahoodns.net
76.13.29.174	A	ws170.progrss.bf1.yahoo.com
76.13.29.176	A	ws101.progrss.bf1.yahoo.com
76.13.29.212	A	bf1-1scheduler-003.adx.bf1.yahoo.com
76.13.30.18	A	bf1-uaddbcx-001.data.bf1.yahoo.com
76.13.30.19	A	bf1-uaddbcx-002.data.bf1.yahoo.com
76.13.31.33	A	aptspare-002.adx.bf1.yahoo.com
76.13.32.42	A	smtp-mob.biz.mail.global.gm0.yahoodns.net
76.13.32.136	A	media-router-apple2.prod.media.vip.bf1.yahoo.com
76.13.32.146	A	spdc.pbp.vip.bf1.yahoo.com
76.13.32.147	A	spcms.pbp.vip.bf1.yahoo.com
76.13.32.147	A	spcms-global.pbp.gysm.yahoodns.net
76.13.34.6	A	usw2-1-e.yahoo.com
76.13.34.25	A	srv.ysm.vip.ac4.yahoo.com
76.13.34.26	A	cmls.eu.overture.com
76.13.34.26	A	cmls.overture.com
76.13.38.1	PTR	unknown-76-13-38-x.yahoo.com
76.13.43.3	PTR	unknown-76-13-43-x.yahoo.com
76.13.44.3	PTR	unknown-76-13-44-x.yahoo.com
76.13.47.130	PTR	unknown-76-13-47-x.yahoo.com
76.13.57.0	PTR	unknown-76-13-57-x.yahoo.com
76.13.62.84	A	a323.yahoofs.a00.yahoodns.net
76.13.62.95	A	a367.yahoofs.com
76.13.62.95	A	a367.yahoofs.a00.yahoodns.net
76.13.63.61	A	fe1.shine.lifestyles.fy11.b.yahoo.com
76.13.68.1	PTR	unknown-76-13-68-x.yahoo.com
76.13.75.131	PTR	unknown-76-13-75-x.yahoo.com
76.13.77.1	PTR	unknown-76-13-77-x.yahoo.com
76.13.82.1	PTR	unknown-76-13-82-x.yahoo.com
76.13.85.129	PTR	unknown-76-13-85-x.yahoo.com
76.13.86.130	PTR	unknown-76-13-86-x.yahoo.com
76.13.88.129	PTR	unknown-76-13-88-x.yahoo.com
76.13.95.3	PTR	unknown-76-13-95-x.yahoo.com
76.13.97.207	A	ac4-qaamdb-clu.yahoo.com
76.13.104.30	A	*.yadvertisingblog.com
76.13.105.2	PTR	unknown-76-13-105-x.yahoo.com
76.13.111.2	PTR	unknown-76-13-111-x.yahoo.com
76.13.111.131	PTR	unknown-76-13-111-x.yahoo.com
76.13.114.60	A	finance.yahoo.ca
76.13.114.81	A	billing.finance.yahoo.com
76.13.114.81	A	billing.finance.fy7.b.yahoo.com
76.13.114.89	A	ichart1.finance.vip.ac4.yahoo.com
76.13.114.178	A	screener.finance.yahoo.com
76.13.115.6	A	c41.finance.ac4.yahoo.com
76.13.115.29	A	fe1.preprd.global.media.vip.ac4.yahoo.com
76.13.115.39	A	mtf1.news.ac4.yahoo.com
76.13.115.86	A	sws1.finance.vip.ac4.yahoo.com
76.13.115.167	A	headlines.finance.yahoo.com
76.13.115.168	A	headlines.finance.yahoo.com
76.13.115.169	A	headlines.finance.yahoo.com
76.13.115.186	A	markettracker1.finance.vip.ac4.yahoo.com
76.13.115.221	A	api15.finance.ac4.yahoo.com
76.13.116.38	A	deportes.yahoo.com
76.13.119.0	PTR	unknown-76-13-119-x.yahoo.com
76.13.119.75	A	test.markettracker.finance.yahoo.com
76.13.122.213	A	lrdc1.stage.rel.pool.ac4.yahoo.com
76.13.125.2	PTR	unknown-76-13-125-x.yahoo.com
76.13.126.181	A	redirect1.music.a01.yahoodns.net