Robtex

Up: 74.6.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 74.6.0.0/20
Down right: 74.6.16.0/20

IP	Type	Hostname
74.6.0.0	PTR	lo0.egr1-1-gra.bf1.yahoo.com
74.6.0.2	A+PTR	lo0.egr3-3-gra.bf1.yahoo.com
74.6.0.3	A+PTR	lo0.egr4-4-gra.bf1.yahoo.com
74.6.0.4	A	lo0.egr5-5-gra.bf1.yahoo.com
74.6.0.5	A	lo0.egr6-6-gra.bf1.yahoo.com
74.6.0.65	A+PTR	lo0.tor34-66-gra.bf1.yahoo.com
74.6.0.68	A	lo0.tor37-69-gra.bf1.yahoo.com
74.6.0.69	A	lo0.tor38-70-gra.bf1.yahoo.com
74.6.0.70	A	lo0.tor39-71-gra.bf1.yahoo.com
74.6.0.96	A+PTR	lo0.tor63-97-gra.bf1.yahoo.com
74.6.0.98	A+PTR	lo0.tor65-99-gra.bf1.yahoo.com
74.6.0.100	A	lo0.tor68-101-gra.bf1.yahoo.com
74.6.0.103	A	lo0.tor71-104-gra.bf1.yahoo.com
74.6.0.128	A+PTR	lo0.tor80-129-gra.bf1.yahoo.com
74.6.0.132	A	lo0.tor84-133-gra.bf1.yahoo.com
74.6.0.133	A	lo0.tor85-134-gra.bf1.yahoo.com
74.6.0.134	A	lo0.tor86-135-gra.bf1.yahoo.com
74.6.0.160	PTR	unknown-74-6-0-x.yahoo.com
74.6.0.161	PTR	unknown-74-6-0-x.yahoo.com
74.6.0.162	PTR	unknown-74-6-0-x.yahoo.com
74.6.0.163	PTR	unknown-74-6-0-x.yahoo.com
74.6.0.192	PTR	unknown-74-6-0-x.yahoo.com
74.6.2.0	PTR	unknown-74-6-2-x.yahoo.com
74.6.2.2	PTR	unknown-74-6-2-x.yahoo.com
74.6.2.30	A	lo0.lef15-1-gra.bf1.yahoo.com
74.6.2.90	A	lo0.lef11-2-gra.bf1.yahoo.com
74.6.7.97	PTR	unknown-74-6-7-x.yahoo.com
74.6.8.0	PTR	unknown-74-6-8-x.yahoo.com
74.6.8.3	PTR	unknown-74-6-8-x.yahoo.com
74.6.8.11	A	ge-4-4.bas3-1-con.ac2.yahoo.com
74.6.8.98	PTR	unknown-74-6-8-x.yahoo.com
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
74.6.22.12	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
74.6.24.157	A	lj511663.crawl.yahoo.net
74.6.28.0	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
74.6.28.162	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
74.6.31.2	PTR	unknown-74-6-31-x.yahoo.com