Robtex

Up: 72.30.35.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 72.30.35.0/26
Down right: 72.30.35.64/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.30.35.2	PTR	ha2.vl-156.bas-1-flk.bf1.yahoo.com
72.30.35.3	A+PTR	vl-156.bas1-1-flk.bf1.yahoo.com
72.30.35.4	A+PTR	vl-156.bas2-1-flk.bf1.yahoo.com
72.30.35.6	A+PTR	vl-156.slb4-1-flk.bf1.yahoo.com
72.30.35.7	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.8	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.9	PTR	unknown.yahoo.com
72.30.35.9	A	unbsd.com
72.30.35.9	A	220tech.in
72.30.35.10	PTR	unknown.yahoo.com
72.30.35.10	A	unbsd.com
72.30.35.10	A	yahoo.com
72.30.35.12	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.13	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.14	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.15	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.18	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.20	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.21	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.23	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.30	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.31	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.32	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.33	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.34	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.35	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.36	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.37	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.38	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.39	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.41	A+PTR	whs-02.ops.bf1.yahoo.com
72.30.35.43	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.44	A+PTR	whs-03.ops.yahoo.com
72.30.35.45	A+PTR	whs-01.ops.yahoo.com
72.30.35.48	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.51	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.52	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.53	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.54	A+PTR	secops-proxy-01.ops.bf1.yahoo.com
72.30.35.55	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.56	A+PTR	secops-proxy-02.ops.bf1.yahoo.com
72.30.35.57	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.58	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.59	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.60	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.61	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.62	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.64	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.69	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.70	A+PTR	secops-rdp-01.ops.bf1.yahoo.com
72.30.35.73	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.75	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.79	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.80	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.81	A+PTR	ha1.vl-350.bas-1-flk.bf1.yahoo.com
72.30.35.82	A+PTR	vl-350.bas1-1-flk.bf1.yahoo.com
72.30.35.84	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.88	PTR	t2.time.bf1.yahoo.com
72.30.35.88	A	1.tandberg.pool.ntp.org
72.30.35.88	A	us.pool.ntp.org
72.30.35.89	PTR	t1.time.bf1.yahoo.com
72.30.35.89	A	3.north-america.pool.ntp.org
72.30.35.89	A	0.ciscosb.pool.ntp.org
72.30.35.92	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.94	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.95	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.101	A+PTR	og01.ktc.net.bfz.yahoo.com
72.30.35.103	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.104	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.108	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.113	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.115	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.118	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.119	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.120	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.121	PTR	unknown-72-30-35-x.yahoo.com
72.30.35.126	PTR	unknown-72-30-35-x.yahoo.com