Robtex

Up: 74.6.136.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 74.6.136.128/26
Down right: 74.6.136.192/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
74.6.136.129	PTR	ha1.vl120.usw-1-lba.bf2.yahoo.com
74.6.136.130	PTR	ha2.vl120.usw-1-lba.bf2.yahoo.com
74.6.136.135	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.136	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.137	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.140	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.142	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.146	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.150	PTR	w2.src.vip.bf1.yahoo.com
74.6.136.150	A	aol-cd-burning.com
74.6.136.150	A	rocketmail.ru
74.6.136.151	PTR	unknown.yahoo.com
74.6.136.151	A	yahoo.co.in
74.6.136.151	A	yahoosupport-australia.com
74.6.136.152	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.152	A	yahoo7.com.au
74.6.136.153	PTR	w2.src3.vip.bf1.yahoo.com
74.6.136.153	A	huffpost.co.za
74.6.136.153	A	mapquestapi.com
74.6.136.155	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.157	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.161	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.162	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.164	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.170	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.171	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.176	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.177	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.179	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.180	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.181	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.183	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.185	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.186	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.188	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.189	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.190	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.194	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.197	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.198	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.203	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.205	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.207	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.208	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.213	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.215	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.219	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.221	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.222	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.225	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.227	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.229	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.236	PTR	unknown.yahoo.com
74.6.136.237	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.240	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.242	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.244	A+PTR	l.mx.mail.yahoo.com
74.6.136.245	PTR	qaxms1.l7.search.vip.bf2.yahoo.com
74.6.136.247	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.248	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.250	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.253	PTR	unknown-74-6-136-x.yahoo.com
74.6.136.255	PTR	unknown-74-6-136-x.yahoo.com