Robtex

Up: 216.166.96.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 216.166.96.0/22
Down right: 216.166.100.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.166.97.131	A+PTR	news.giganews.com
216.166.97.131	A	news-central.giganews.com
216.166.97.131	A	news-west.giganews.com
216.166.97.138	A+PTR	news-50.giganews.com
216.166.97.139	A+PTR	ns3.giganews.com
216.166.97.139	A+PTR	ns1.dca1.giganews.com
216.166.97.139	A	ns1.dca.giganews.com
216.166.97.146	A+PTR	text.isp.giganews.com
216.166.97.146	A	news.sccoast.net
216.166.97.148	A	rs100.giganews.com
216.166.97.149	A	rs102.dca.giganews.com
216.166.97.160	A+PTR	news.rhinonewsgroups.com
216.166.97.161	A+PTR	news.powerusenet.com
216.166.97.169	PTR	news.mozilla.giganews.com
216.166.97.169	A	news.mozilla.org
216.166.97.171	A+PTR	news.usenet.net
216.166.97.171	A	news.cheapnewsgroups.com
216.166.97.171	A	news.fastusenet.com
216.166.98.3	PTR	216-166-98-3.fwd.datafoundry.com
216.166.98.40	PTR	216-166-98-40.fwd.datafoundry.com
216.166.98.40	A	radius.auth.giganews.com
216.166.98.41	PTR	216-166-98-41.fwd.datafoundry.com
216.166.98.41	A	radius.auth.giganews.com
216.166.98.42	PTR	216-166-98-42.fwd.datafoundry.com
216.166.98.42	A	radius.auth.giganews.com
216.166.98.43	PTR	216-166-98-43.fwd.datafoundry.com
216.166.98.43	A	radius.auth.giganews.com
216.166.98.74	A+PTR	num1.nntp.dca1.giganews.com
216.166.98.74	A	news-out.nntp.giganews.com
216.166.98.75	PTR	216-166-98-75.fwd.datafoundry.com
216.166.98.75	A	news-out.nntp.giganews.com
216.166.98.76	A	news-out.nntp.giganews.com
216.166.98.77	A	news-out.nntp.giganews.com
216.166.98.77	A	local.nntp.dca1.giganews.com
216.166.98.77	A	local1.nntp.dca1.giganews.com
216.166.98.84	A	news-out.nntp.giganews.com
216.166.98.85	A	news-out.nntp.giganews.com
216.166.98.90	PTR	buffer1.nntp.dca1.giganews.com
216.166.98.90	A	news-out.nntp.giganews.com
216.166.98.91	PTR	216-166-98-91.fwd.datafoundry.com
216.166.98.91	A	news-out.nntp.giganews.com
216.166.98.92	A	news-out.nntp.giganews.com
216.166.98.93	A	news-out.nntp.giganews.com
216.166.98.94	A	news-out.nntp.giganews.com
216.166.98.95	A	news-out.nntp.giganews.com
216.166.99.133	A	giganews.com
216.166.99.133	A	www.giganewseurope.net
216.166.99.133	A	nl.giganews.com
216.166.99.212	A	intranet.giganews.com
216.166.99.213	A	sb.intranet.giganews.com
216.166.100.34	A+PTR	r10.gc.dca1.giganews.com
216.166.100.67	A+PTR	r26-2.gc.dca1.giganews.com
216.166.100.209	A+PTR	r97-2.gc.dca1.giganews.com
216.166.100.239	A	r112-2.gc.dca1.giganews.com
216.166.101.6	A	216-166-101-6.fwd.datafoundry.com
216.166.101.35	A+PTR	r129-2.gc.dca1.giganews.com
216.166.101.101	A	216-166-101-101.fwd.datafoundry.com
216.166.101.105	A+PTR	216-166-101-105.fwd.datafoundry.com
216.166.101.136	A+PTR	216-166-101-136.fwd.datafoundry.com
216.166.101.227	A+PTR	216-166-101-227.fwd.datafoundry.com