Robtex

Up: 76.13.28.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 76.13.28.0/26
Down right: 76.13.28.64/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
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+PTR	vl-122.usw6-45-pdb.bf1.yahoo.com
76.13.28.6	PTR	usw20-1-apg.bf1.yahoo.com
76.13.28.7	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.7	A	media-router-flurry2.prod.media.wg1.b.yahoo.com
76.13.28.9	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.10	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.13	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.19	PTR	sendmailws-v1.mail.vip.bf1.yahoo.com
76.13.28.21	A+PTR	av-beap.adx.vip.bf1.yahoo.com
76.13.28.21	A	beapav.bc.gysm.yahoodns.net
76.13.28.21	A	us-beapav.bc.gysm.yahoodns.net
76.13.28.23	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.23	A	x-master.ue.vip.bf1.yahoo.net
76.13.28.26	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.27	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.28	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.29	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.31	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.33	A+PTR	test2-hc-rm.sutha.netops.vip.bf1.yahoo.com
76.13.28.34	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.36	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.37	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.38	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.39	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.42	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.44	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.45	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.46	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.49	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.50	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.51	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.55	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.57	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.58	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.60	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.65	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.65	A	y.it.a03.yahoodns.net
76.13.28.67	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.69	A+PTR	master.ue.vip.bf1.yahoo.net
76.13.28.69	A	master.ue.aycpi.b.yahoodns.net
76.13.28.70	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.70	A	csc.beap.ad.yieldmanager.net
76.13.28.70	A	csc-beap.adx.vip.bf1.yahoo.com
76.13.28.71	A	ats-lorax.info.g03.yahoodns.net
76.13.28.76	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.78	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.82	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.83	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.86	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.87	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.91	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.96	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.97	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.101	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.103	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.106	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.108	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.111	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.113	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.117	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.119	PTR	unknown-76-13-28-x.yahoo.com
76.13.28.126	PTR	unknown.yahoo.com
76.13.28.127	PTR	unknown-76-13-28-x.yahoo.com