Robtex

Up: 81.171.80.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 81.171.88.0/22
Down right: 81.171.92.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.171.88.12	A+PTR	newsfeed6.eweka.nl
81.171.88.15	A	lightspeed.eweka.nl
81.171.88.16	A	feeder2.eweka.nl
81.171.88.16	A	hq-usenetpeers.eweka.nl
81.171.88.18	A+PTR	nt-form01.am4.eweka.nl
81.171.88.20	A	phpfeed.eweka.nl
81.171.88.25	PTR	upload1.eweka.nl
81.171.88.30	A	monitor1.eweka.nl
81.171.88.90	PTR	ew-busvoice-81-171-88-90.eweka.nl
81.171.88.111	A	usenetmonitor1.eweka.nl
81.171.88.112	A	usenetmonitor2.eweka.nl
81.171.88.131	PTR	ew-busvoice-81-171-88-131.eweka.nl
81.171.88.137	PTR	newsreader102.eweka.nl
81.171.88.138	PTR	newsreader101.eweka.nl
81.171.88.144	PTR	newsreader95.eweka.nl
81.171.88.145	PTR	newsreader94.eweka.nl
81.171.88.146	PTR	newsreader93.eweka.nl
81.171.88.153	PTR	newsreader86.eweka.nl
81.171.88.154	PTR	newsreader85.eweka.nl
81.171.88.155	PTR	newsreader84.eweka.nl
81.171.88.161	PTR	newsreader78.eweka.nl
81.171.88.162	PTR	newsreader77.eweka.nl
81.171.88.163	PTR	newsreader76.eweka.nl
81.171.88.169	PTR	newsreader70.eweka.nl
81.171.88.170	PTR	newsreader69.eweka.nl
81.171.88.176	PTR	newsreader63.eweka.nl
81.171.88.177	PTR	newsreader62.eweka.nl
81.171.88.178	PTR	newsreader61.eweka.nl
81.171.88.184	PTR	newsreader57.eweka.nl
81.171.88.186	PTR	newsreader55.eweka.nl
81.171.88.187	PTR	newsreader54.eweka.nl
81.171.88.194	PTR	newsreader51.eweka.nl
81.171.88.195	PTR	newsreader50.eweka.nl
81.171.88.205	A	newsfeed5.eweka.nl
81.171.88.208	PTR	newsreader40.eweka.nl
81.171.88.211	PTR	newsreader37.eweka.nl
81.171.88.215	A	newsfeed4.eweka.nl
81.171.88.216	PTR	newsreader33.eweka.nl
81.171.88.218	PTR	newsreader31.eweka.nl
81.171.88.219	PTR	newsreader30.eweka.nl
81.171.88.224	PTR	newsreader25.eweka.nl
81.171.88.227	PTR	newsreader24.eweka.nl
81.171.88.233	PTR	newsreader18.eweka.nl
81.171.88.235	A+PTR	newsfeed3.eweka.nl
81.171.88.241	PTR	newsreader12.eweka.nl
81.171.88.243	PTR	newsreader10.eweka.nl
81.171.88.245	A	newsfeed2.eweka.nl
81.171.88.248	PTR	newsreader6.eweka.nl
81.171.88.249	PTR	newsreader5.eweka.nl
81.171.88.250	A	feeder3.eweka.nl
81.171.88.251	PTR	newsreader3.eweka.nl
81.171.88.254	A	newsfeed.eweka.nl
81.171.92.183	A	europe.newsfusion.net
81.171.92.183	A	eu.newsfusion.net
81.171.92.183	A	eunews.wwwspace.net
81.171.92.184	A	argeweb.svc.highwinds-media.com
81.171.92.184	A	usenet.argeweb.nl
81.171.92.187	A	news3.usenet4u.nl
81.171.92.187	A	news.usenet4u.nl
81.171.92.192	A	ssl.hitnews.eu
81.171.92.192	A	news.hitnews.com
81.171.92.192	A	hitnews.svc.highwinds-media.com
81.171.92.201	A	eu.news.astraweb.com
81.171.92.201	A	ssl.astraweb.com
81.171.92.201	A	ssl-eu.astraweb.com
81.171.92.203	A	eu.news.astraweb.com
81.171.92.203	A	ssl.astraweb.com
81.171.92.203	A	ssl-eu.astraweb.com
81.171.92.205	A	news.eweka.nl
81.171.92.211	A	news2.pfcorner.nl
81.171.92.211	A	frugalusenet-ams.sslusenet.com
81.171.92.213	A	graboid.ams4.highwinds-media.com
81.171.92.219	A	newsreader116.eweka.nl
81.171.92.219	A	newsreader85.eweka.nl
81.171.92.219	A	news.eweka.nl
81.171.92.221	PTR	eu.bintube.com
81.171.92.224	A	ssl.news-europe.newsrazor.net
81.171.92.224	A	news.eu.newshosting.com
81.171.92.224	A	bignews.usenetmonster.com
81.171.92.227	A	graboid.ams4.highwinds-media.com
81.171.92.233	A	news.eweka.nl
81.171.92.233	A	newsreader95.eweka.nl
81.171.92.233	A	newsreader61.eweka.nl
81.171.92.235	PTR	eu.bintube.com
81.171.92.238	A	ssl.news-europe.newsrazor.net
81.171.92.238	A	news.eu.newshosting.com
81.171.92.238	A	bignews.usenetmonster.com
81.171.92.240	A	blocknews-ams.sslusenet.com
81.171.93.1	A	ar3.am4.hwng.net