Robtex

Up: 72.30.0.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 72.30.8.0/22
Down right: 72.30.12.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.30.9.225	A	fan-draft146.sports.bf1.yahoo.com
72.30.9.226	PTR	unknown-72-30-9-x.yahoo.com
72.30.9.230	A	fan-draft104.sports.bf1.yahoo.com
72.30.9.230	A	fan-draft104-east.stream.sports.yahoo.com
72.30.9.232	A	fan-draft148.sports.bf1.yahoo.com
72.30.9.235	PTR	unknown-72-30-9-x.yahoo.com
72.30.9.235	A	fan-draft126.sports.bf1.yahoo.com
72.30.9.236	A	fan-draft139.sports.bf1.yahoo.com
72.30.9.237	A	fan-draft106.sports.bf1.yahoo.com
72.30.9.241	PTR	ug317006.yst.yahoo.net
72.30.9.241	A	fan-draft130.sports.bf1.yahoo.com
72.30.9.242	PTR	ug311000.yst.yahoo.net
72.30.9.244	A	fan-draft110.sports.bf1.yahoo.com
72.30.9.247	A	fan-draft137.sports.bf1.yahoo.com
72.30.9.248	PTR	ug317010.yst.yahoo.net
72.30.9.248	A	fan-draft132.sports.bf1.yahoo.com
72.30.9.248	A	fan-draft142.sports.bf1.yahoo.com
72.30.9.249	A	fan-draft128.sports.bf1.yahoo.com
72.30.9.251	A	fan-draft108.sports.bf1.yahoo.com
72.30.10.32	PTR	unknown-72-30-10-x.yahoo.com
72.30.10.66	PTR	unknown-72-30-10-x.yahoo.com
72.30.10.67	PTR	unknown-72-30-10-x.yahoo.com
72.30.10.67	A	loadfb2.bkln.sk1.yahoo.com
72.30.10.97	PTR	unknown-72-30-10-x.yahoo.com
72.30.10.98	PTR	unknown-72-30-10-x.yahoo.com
72.30.10.98	A	fan-draft189.sports.bf1.yahoo.com
72.30.10.100	A	fan-draft185.sports.bf1.yahoo.com
72.30.10.160	PTR	rtc111.stage.ls.sk1.yahoo.com
72.30.10.160	A	fan-draft186.sports.bf1.yahoo.com
72.30.10.218	A+PTR	zcs1.cal.vip.sk1.yahoo.com
72.30.10.218	A	ics.calendar.yahoo.com
72.30.11.187	A	ssl-img.a00.yahoodns.net
72.30.11.242	A+PTR	sonictest-242.mail.bf1.yahoo.com
72.30.11.242	A	a323.yahoofs.a00.yahoodns.net
72.30.11.242	A	f32.ymdb.vip.sk1.yahoo.com
72.30.12.27	A	r3-f.bpk.dns.sk1.yahoo.com
72.30.12.31	A	fe1.yosup.g1.b.yahoo.com
72.30.12.32	A+PTR	thmyts1.image.search.vip.sk1.yahoo.com
72.30.12.32	A	img.thumbnails.g00.yahoodns.net
72.30.12.32	A	any-img.thumbnails.a00.yahoodns.net
72.30.12.175	A	rtc1310.ls.sk1.yahoo.com
72.30.13.204	A	srd-new.yahoo.com
72.30.13.205	A	srd-new.yahoo.com
72.30.13.206	A	srd-new.yahoo.com
72.30.13.206	A	devnull.yahoo.com
72.30.14.0	PTR	unknown-72-30-14-x.yahoo.com
72.30.14.9	PTR	b165.crawl.yahoo.net
72.30.14.10	PTR	b166.crawl.yahoo.net
72.30.14.11	A+PTR	b167.crawl.yahoo.net
72.30.14.27	PTR	unknown-72-30-14-x.yahoo.com
72.30.14.64	A+PTR	b101.crawl.yahoo.net
72.30.14.65	A+PTR	b102.crawl.yahoo.net
72.30.14.67	PTR	f36.ymdb.vip.sk1.yahoo.com
72.30.14.68	A	b105.crawl.yahoo.net
72.30.14.69	A	b106.crawl.yahoo.net
72.30.14.74	A+PTR	b111.crawl.yahoo.net
72.30.14.77	A	b114.crawl.yahoo.net
72.30.14.80	A+PTR	b117.crawl.yahoo.net
72.30.14.81	A+PTR	b118.crawl.yahoo.net
72.30.14.82	A+PTR	b119.crawl.yahoo.net
72.30.14.83	PTR	b120.crawl.yahoo.net
72.30.14.86	A	b123.crawl.yahoo.net
72.30.14.88	PTR	b125.crawl.yahoo.net
72.30.14.89	A+PTR	b126.crawl.yahoo.net
72.30.14.90	PTR	unknown-72-30-14-x.yahoo.com
72.30.14.91	PTR	b128.crawl.yahoo.net
72.30.14.94	A	b131.crawl.yahoo.net
72.30.14.95	A	b132.crawl.yahoo.net
72.30.14.96	PTR	unknown-72-30-14-x.yahoo.com
72.30.14.97	A+PTR	b134.crawl.yahoo.net
72.30.14.98	A+PTR	b135.crawl.yahoo.net
72.30.14.99	PTR	b136.crawl.yahoo.net
72.30.14.102	A	b139.crawl.yahoo.net
72.30.14.104	PTR	b141.crawl.yahoo.net
72.30.14.105	PTR	b142.crawl.yahoo.net
72.30.14.106	A+PTR	b143.crawl.yahoo.net
72.30.14.107	PTR	b144.crawl.yahoo.net
72.30.14.109	A	b146.crawl.yahoo.net
72.30.14.112	PTR	b149.crawl.yahoo.net
72.30.14.113	PTR	b150.crawl.yahoo.net
72.30.14.114	A+PTR	b151.crawl.yahoo.net
72.30.14.115	PTR	b152.crawl.yahoo.net
72.30.14.116	A	b153.crawl.yahoo.net
72.30.14.117	A	b154.crawl.yahoo.net
72.30.14.120	PTR	unknown-72-30-14-x.yahoo.com
72.30.14.120	A	b157.crawl.yahoo.net
72.30.14.121	A+PTR	b158.crawl.yahoo.net
72.30.14.122	A+PTR	b159.crawl.yahoo.net
72.30.14.123	A+PTR	b160.crawl.yahoo.net
72.30.14.129	A+PTR	ha1.vl-211.bas-1-flk.bf1.yahoo.com
72.30.14.130	A+PTR	ha2.vl-211.bas-1-flk.bf1.yahoo.com
72.30.14.131	A+PTR	vl-211.bas1-1-flk.bf1.yahoo.com
72.30.14.145	PTR	unknown-72-30-14-x.yahoo.com
72.30.14.146	PTR	unknown-72-30-14-x.yahoo.com
72.30.14.147	PTR	unknown-72-30-14-x.yahoo.com
72.30.14.152	PTR	unknown-72-30-14-x.yahoo.com
72.30.14.153	PTR	unknown-72-30-14-x.yahoo.com
72.30.14.154	PTR	unknown-72-30-14-x.yahoo.com
72.30.14.155	PTR	unknown-72-30-14-x.yahoo.com
72.30.14.160	PTR	unknown-72-30-14-x.yahoo.com
72.30.14.161	PTR	unknown-72-30-14-x.yahoo.com
72.30.14.194	PTR	unknown-72-30-14-x.yahoo.com