Robtex

Up: 74.6.104.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 74.6.106.0/24
Down right: 74.6.107.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
74.6.106.10	PTR	unknown.yahoo.com
74.6.106.10	A	up.tripod.vip.bf2.yahoo.com
74.6.106.10	A	up-bf2.tripod.yahoo.com
74.6.106.12	PTR	3pi-web.srv.vip.sk1.yahoo.com
74.6.106.12	A	proxy.docker.ops.g04.yahoodns.net
74.6.106.13	A	us-proxy-mobstor.g03.yahoodns.net
74.6.106.13	A	prod-proxy.mobstor.vip.bf2.yahoo.com
74.6.106.14	A+PTR	jpop400-pri.mail.vip.bf2.yahoo.com
74.6.106.14	A	fo-jpop.mail.att.gm0.yahoodns.net
74.6.106.14	A	plus.pop.mail.yahoo.com
74.6.106.25	PTR	unknown-74-6-106-x.yahoo.com
74.6.106.26	A+PTR	sky400-1.mail.vip.bf2.yahoo.com
74.6.106.26	A	internal.imap.mail.g03.yahoodns.net
74.6.106.27	PTR	tpi2006.rm.sk1.yahoo.com
74.6.106.27	A	datax-fe001.prod.tgt.vip.bf1.yahoo.com
74.6.106.27	A	datax-fe001.prod.tgt.a03.yahoodns.net
74.6.106.28	PTR	calgate1.cal.vip.bf2.yahoo.com
74.6.106.28	A	caldav.calendar.yahoo.com
74.6.106.28	A	it.calendar.yahoo.com
74.6.106.29	PTR	jpop400-sec.mail.vip.bf2.yahoo.com
74.6.106.29	A	fo-jpop.mail.att.gm0.yahoodns.net
74.6.106.29	A	fo-jpop.mail.am0.yahoodns.net