Robtex

Up: 74.6.0.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 74.6.16.0/21
Down right: 74.6.24.0/21

IP	Type	Hostname
74.6.16.163	PTR	unknown-74-6-16-x.yahoo.com
74.6.17.2	PTR	unknown-74-6-17-x.yahoo.com
74.6.17.6	A	ha6.ge-5-16.bas-1-con.ac2.yahoo.com
74.6.17.34	PTR	unknown-74-6-17-x.yahoo.com
74.6.18.208	PTR	gi-5-9.bas8-1-con.ac2.yahoo.com
74.6.18.240	PTR	unknown-74-6-18-x.yahoo.com
74.6.19.83	PTR	unknown-74-6-19-x.yahoo.com
74.6.20.16	PTR	unknown-74-6-20-x.yahoo.com
74.6.22.12	A	ge-4-44.bas4-1-con.ac2.yahoo.com
74.6.22.34	PTR	unknown-74-6-22-x.yahoo.com
74.6.22.100	A	llfproxy.crawl.yahoo.net
74.6.22.109	A	llfproxy.crawl.yahoo.net
74.6.22.111	A	llfproxy.crawl.yahoo.net
74.6.22.113	A	llfproxy.crawl.yahoo.net
74.6.22.114	A	llfproxy.crawl.yahoo.net
74.6.22.115	A	llfproxy.crawl.yahoo.net
74.6.22.116	A	llfproxy.crawl.yahoo.net
74.6.22.117	A	llfproxy.crawl.yahoo.net
74.6.22.118	A	llfproxy.crawl.yahoo.net
74.6.22.123	A	llfproxy.crawl.yahoo.net
74.6.23.177	PTR	unknown-74-6-23-x.yahoo.com
74.6.24.157	A	lj511663.crawl.yahoo.net
74.6.25.179	PTR	unknown-74-6-25-x.yahoo.com
74.6.28.0	PTR	unknown-74-6-28-x.yahoo.com
74.6.28.17	PTR	unknown-74-6-28-x.yahoo.com
74.6.28.18	PTR	unknown-74-6-28-x.yahoo.com
74.6.28.32	PTR	unknown-74-6-28-x.yahoo.com
74.6.28.33	PTR	unknown-74-6-28-x.yahoo.com
74.6.28.34	PTR	unknown-74-6-28-x.yahoo.com
74.6.28.50	PTR	unknown-74-6-28-x.yahoo.com
74.6.28.81	PTR	unknown-74-6-28-x.yahoo.com
74.6.28.82	PTR	unknown-74-6-28-x.yahoo.com
74.6.28.147	PTR	unknown-74-6-28-x.yahoo.com
74.6.28.162	PTR	unknown-74-6-28-x.yahoo.com
74.6.28.176	PTR	unknown-74-6-28-x.yahoo.com
74.6.28.209	PTR	unknown-74-6-28-x.yahoo.com
74.6.28.210	PTR	unknown-74-6-28-x.yahoo.com
74.6.28.224	PTR	unknown-74-6-28-x.yahoo.com
74.6.28.227	PTR	unknown-74-6-28-x.yahoo.com
74.6.28.240	PTR	unknown-74-6-28-x.yahoo.com
74.6.28.242	PTR	unknown-74-6-28-x.yahoo.com
74.6.28.243	PTR	unknown-74-6-28-x.yahoo.com
74.6.31.2	PTR	unknown-74-6-31-x.yahoo.com