Robtex

Up: 216.196.96.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 216.196.96.0/23
Down right: 216.196.98.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.196.96.2	A	gw2.dca.giganews.com
216.196.96.5	A	gw1-g.dca.giganews.com
216.196.96.13	A+PTR	cs2-g.dca.giganews.com
216.196.96.46	A	sw2-g.dca.giganews.com
216.196.96.54	A+PTR	gw1.mia.giganews.com
216.196.96.86	A+PTR	shaw.giganews.com
216.196.97.5	PTR	www.dca.giganews.com
216.196.97.129	PTR	testing.giganews.com
216.196.97.129	A	test.giganews.com
216.196.97.131	PTR	news.giganews.com
216.196.97.132	PTR	news-asia.giganews.com
216.196.97.133	PTR	asia.isp.giganews.com
216.196.97.134	A+PTR	event.giganews.com
216.196.97.138	PTR	news-50.giganews.com
216.196.97.140	PTR	text.giganews.com
216.196.97.142	PTR	news.isp.giganews.com
216.196.97.142	A	news.rcn.net
216.196.97.142	A	news.eni.net
216.196.97.144	PTR	news-europe.giganews.com
216.196.97.145	PTR	europe.isp.giganews.com
216.196.97.148	PTR	rs100.dca.giganews.com
216.196.97.160	PTR	news.rhinonewsgroups.com
216.196.97.161	PTR	news.powerusenet.com
216.196.97.169	A+PTR	news.mozilla.giganews.com
216.196.97.170	PTR	rs101.dca.giganews.com
216.196.97.171	PTR	news.usenet.net
216.196.97.172	A+PTR	rs103.dca.giganews.com
216.196.97.172	A	rs103.giganews.com
216.196.97.172	A	news.graboid.com
216.196.97.224	PTR	www.giganews.com
216.196.97.225	PTR	secure.giganews.com
216.196.97.226	PTR	de.giganews.com
216.196.97.227	PTR	es.giganews.com
216.196.97.228	PTR	fr.giganews.com
216.196.97.232	PTR	kr.giganews.com
216.196.97.233	PTR	br.giganews.com
216.196.97.234	PTR	tw.giganews.com
216.196.98.1	A+PTR	gw-vlan201.dca.giganews.com
216.196.98.11	A+PTR	serv3.gc.dca.giganews.com
216.196.98.37	PTR	t06.gc.dca.giganews.com
216.196.98.80	A	temp1-1.dca.giganews.com
216.196.98.82	A	temp2-1.dca.giganews.com
216.196.98.93	A	pd1-1.dca.giganews.com
216.196.98.95	A	pd2-1.dca.giganews.com
216.196.98.99	A	cs1-1.dca.giganews.com
216.196.98.101	A	cs2-1.dca.giganews.com
216.196.98.102	A	cs2-2.dca.giganews.com
216.196.98.103	A	cs3-1.dca.giganews.com
216.196.98.105	A	cs4-1.dca.giganews.com
216.196.98.107	A	cs5-1.dca.giganews.com
216.196.98.109	A	cs6-1.dca.giganews.com
216.196.98.111	A	cs7-1.dca.giganews.com
216.196.98.113	A+PTR	p1-1.dca.giganews.com
216.196.98.115	A	p2-1.dca.giganews.com
216.196.98.117	A	p3-1.dca.giganews.com
216.196.98.118	A	p3-2.dca.giganews.com
216.196.98.119	A	p4-1.dca.giganews.com
216.196.98.121	A	p5-1.dca.giganews.com
216.196.98.122	A	p5-2.dca.giganews.com
216.196.98.123	A	p6-1.dca.giganews.com
216.196.98.125	A	p7-1.dca.giganews.com
216.196.98.142	A	border3.nntp.dca.giganews.com
216.196.98.144	A+PTR	border3-2.nntp.dca.giganews.com
216.196.98.144	A	border3.nntp.dca.giganews.com
216.196.98.145	PTR	border4-2.nntp.dca.giganews.com
216.196.98.146	PTR	border3-3.nntp.dca.giganews.com
216.196.98.146	A	border3.nntp.dca.giganews.com
216.196.98.147	A	border4-3.nntp.dca.giganews.com
216.196.98.148	A+PTR	border1.nntp.dca.giganews.com
216.196.98.150	A	border1.nntp.dca.giganews.com
216.196.98.152	PTR	border1-3.nntp.dca.giganews.com
216.196.98.152	A	border1.nntp.dca.giganews.com
216.196.98.158	PTR	num2.nntp.dca.giganews.com
216.196.98.224	A+PTR	radius.auth.giganews.com
216.196.98.225	A+PTR	radius.auth.giganews.com
216.196.98.226	A+PTR	radius.auth.giganews.com
216.196.98.227	A+PTR	radius.auth.giganews.com
216.196.99.33	A	r18.gc.dca.giganews.com
216.196.99.39	A+PTR	r24.gc.dca.giganews.com
216.196.99.47	PTR	r32.gc.dca.giganews.com
216.196.99.56	A	r41.gc.dca.giganews.com
216.196.99.76	A+PTR	r61.gc.dca.giganews.com
216.196.99.80	A+PTR	r65.gc.dca.giganews.com
216.196.99.83	A+PTR	r68.gc.dca.giganews.com