Robtex

Up: 81.171.112.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 81.171.116.0/23
Down right: 81.171.118.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.171.117.40	A+PTR	s09-b12.fr7.eweka.nl
81.171.117.45	A+PTR	s09-b17.fr7.eweka.nl
81.171.117.74	A+PTR	s09-b24.fr7.eweka.nl
81.171.117.170	A+PTR	s09-b54.fr7.eweka.nl
81.171.118.111	A	ns4.eweka.nl
81.171.118.131	A	news.fr7.usenetserver.com
81.171.118.132	A	news.fr7.usenetserver.com
81.171.118.133	A	news.fr7.usenetserver.com
81.171.118.134	A	bignews.usenetmonster.com
81.171.118.134	A	sgp.as.news.geo.newshosting.com
81.171.118.134	A	news.fr7.newshosting.com
81.171.118.135	A	bignews.usenetmonster.com
81.171.118.135	A	sgp.as.news.geo.newshosting.com
81.171.118.135	A	news.fr7.newshosting.com
81.171.118.136	A	bignews.usenetmonster.com
81.171.118.136	A	sgp.as.news.geo.newshosting.com
81.171.118.136	A	news.fr7.newshosting.com
81.171.118.140	A	ams.binaryboy.com
81.171.118.140	A	eu.redorbnews.com
81.171.118.140	A	amsterdam.newsgroups-download.com
81.171.118.141	A	ams.binaryboy.com
81.171.118.141	A	eu.redorbnews.com
81.171.118.141	A	amsterdam.newsgroups-download.com
81.171.118.142	A	ams.binaryboy.com
81.171.118.142	A	eu.redorbnews.com
81.171.118.142	A	amsterdam.newsgroups-download.com
81.171.118.143	PTR	eu.bintube.com
81.171.118.143	A	eu.news.bintube.com
81.171.118.143	A	eu2.bintube.com
81.171.118.144	PTR	eu.bintube.com
81.171.118.144	A	eu.news.bintube.com
81.171.118.144	A	eu2.bintube.com
81.171.118.145	PTR	eu.bintube.com
81.171.118.145	A	eu.news.bintube.com
81.171.118.145	A	eu2.bintube.com
81.171.118.146	A	news-europe.newsrazor.net
81.171.118.146	A	news-eu-ssl.newsgroupdirect.com
81.171.118.146	A	ssl.news-europe.newsrazor.net
81.171.118.147	A	news-europe.newsrazor.net
81.171.118.147	A	news-eu-ssl.newsgroupdirect.com
81.171.118.147	A	ssl.news-europe.newsrazor.net
81.171.118.148	A	news-europe.newsrazor.net
81.171.118.148	A	news-eu-ssl.newsgroupdirect.com
81.171.118.148	A	ssl.news-europe.newsrazor.net
81.171.118.161	A	alphaload.rr.newshosting.com
81.171.118.162	A	alphaload.rr.newshosting.com
81.171.118.163	A	alphaload.rr.newshosting.com
81.171.118.164	A	firstload.rr.newshosting.com
81.171.118.165	A	firstload.rr.newshosting.com
81.171.118.166	A	firstload.rr.newshosting.com
81.171.118.167	A	graboid.fr7.highwinds-media.com
81.171.118.168	A	graboid.fr7.highwinds-media.com
81.171.118.169	A	graboid.fr7.highwinds-media.com
81.171.118.173	A	ssl.xennews.com
81.171.118.173	A	xennews.svc.highwinds-media.com
81.171.118.173	A	news.xennews.com
81.171.118.177	A	news4.pfcorner.nl
81.171.118.177	A	kabeltex.pfcorner.nl
81.171.118.178	A	europe.newsfusion.net
81.171.118.178	A	eu.newsfusion.net
81.171.118.180	A	blocknews-eu.sslusenet.com
81.171.118.182	A	mail.usenet.secretusenet.com
81.171.118.183	A	fastusenet-eu.sslusenet.com
81.171.119.233	A	fra-dl-03.easynews.com
81.171.119.234	A	fra-dl-04.easynews.com