Robtex

Up: 66.218.72.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 66.218.72.0/24
Down right: 66.218.73.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.218.72.11	PTR	unknown-66-218-72-x.yahoo.com
66.218.72.20	A+PTR	phtml1.store.bf1.yahoo.com
66.218.72.24	A+PTR	vip1a.alltheweb.nl
66.218.72.24	A	alltheweb.nl
66.218.72.43	A+PTR	edit183.store.bf1.yahoo.com
66.218.72.82	PTR	html116.store.bf1.yahoo.com
66.218.72.82	A	eliteetc.com
66.218.72.82	A	mobil1racingstore.com
66.218.72.83	PTR	html117.store.bf1.yahoo.com
66.218.72.83	A	eliteetc.com
66.218.72.83	A	mobil1racingstore.com
66.218.72.84	A	special.store.yahoodns.net
66.218.72.85	PTR	iapi1.store.bf1.yahoo.com
66.218.72.85	A	iapi1.store.yahoodns.net
66.218.72.92	PTR	img105.store.bf1.yahoo.com
66.218.72.103	A+PTR	html105.store.bf1.yahoo.com
66.218.72.112	PTR	unknown-66-218-72-x.yahoo.com
66.218.72.112	A	eliteetc.com
66.218.72.112	A	2xistsocks.com
66.218.72.116	A+PTR	lib1.store.vip.bf1.yahoo.net
66.218.72.116	A	lib.store.yahoodns.net
66.218.72.126	A+PTR	milter103.store.bf1.yahoo.com
66.218.72.131	A+PTR	order1.store.vip.bf1.yahoo.net
66.218.72.131	A	order.store.yahoodns.net
66.218.72.131	A	us-dc1-order.store.yahoo.net
66.218.72.132	PTR	csell.store.vip.bf1.yahoo.net
66.218.72.132	A	*.csell.store.yahoo.net
66.218.72.132	A	csell.store.yahoo.net
66.218.72.143	A+PTR	mail102.store.bf1.yahoo.com
66.218.72.143	A	st-mail1.yahoo.com
66.218.72.149	PTR	beacon1.store.vip.bf1.yahoo.com
66.218.72.149	A	redirect1.vip.store.yahoo.com
66.218.72.149	A	redirect1.vip.store.yahoo.net
66.218.72.150	A+PTR	search3.store.bf1.yahoo.com
66.218.72.216	A+PTR	edit101.store.bf1.yahoo.com
66.218.72.216	A	st1.yahoo.com
66.218.72.217	PTR	edit102.store.bf1.yahoo.com
66.218.72.217	A	st2.yahoo.com
66.218.72.218	A	st3.yahoo.com
66.218.72.219	A+PTR	edit104.store.bf1.yahoo.com
66.218.72.219	A	st4.yahoo.com
66.218.72.220	A+PTR	edit105.store.bf1.yahoo.com
66.218.72.220	A	st5.yahoo.com
66.218.72.221	PTR	edit106.store.bf1.yahoo.com
66.218.72.221	A	st6.yahoo.com
66.218.72.222	A	st7.yahoo.com
66.218.72.223	PTR	edit108.store.bf1.yahoo.com
66.218.72.223	A	st8.yahoo.com
66.218.72.224	A	edit109.store.bf1.yahoo.com
66.218.72.227	A+PTR	edit112.store.bf1.yahoo.com
66.218.72.227	A	st12.yahoo.com
66.218.72.228	A	st13.yahoo.com
66.218.72.229	A+PTR	edit114.store.bf1.yahoo.com
66.218.72.229	A	st14.yahoo.com
66.218.72.230	A+PTR	edit115.store.bf1.yahoo.com
66.218.72.230	A	st15.yahoo.com
66.218.72.232	A	st17.yahoo.com
66.218.72.236	PTR	edit121.store.bf1.yahoo.com
66.218.72.236	A	st21.yahoo.com
66.218.72.237	A+PTR	edit122.store.bf1.yahoo.com
66.218.72.237	A	st22.yahoo.com
66.218.72.239	A+PTR	edit124.store.bf1.yahoo.com
66.218.72.239	A	st24.yahoo.com
66.218.72.248	A+PTR	edit133.store.bf1.yahoo.com
66.218.73.98	A	harvester-heartbeat.media.yahoo.com
66.218.73.250	PTR	unknown-66-218-73-x.yahoo.com
66.218.73.253	PTR	unknown-66-218-73-x.yahoo.com