Robtex

Up: 212.23.128.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 212.23.129.0/25
Down right: 212.23.129.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
212.23.129.2	A+PTR	ns.tmr.net
212.23.129.2	A	ns.esn-bochum.de
212.23.129.2	A	bo-uwka-srv02.de.tmr.net
212.23.129.10	A+PTR	smx01.de.tmr.net
212.23.129.14	A	virtual.tmr.net
212.23.129.20	PTR	web01.de.tmr.net
212.23.129.20	A	energieeinsparcoach.info
212.23.129.20	A	bodax.org
212.23.129.23	A	shop.rewirpower.de
212.23.129.27	A	www.centrona.de
212.23.129.50	A	mx01.tmr-cloud.net
212.23.129.67	A+PTR	mail.micram.com
212.23.129.75	A	remote.bovg.de
212.23.129.90	A	srv01.df8do.de
212.23.129.92	A	srv03.df8do.de
212.23.129.94	A	srv04.df8do.de
212.23.129.113	A+PTR	ge-2-0-101702.vr-tmr.bo-uhla-erx02.de.tmr.net
212.23.129.117	A	sdsl-129-117.customer.tmr.net
212.23.129.118	A	mail.jewo.de
212.23.129.118	A	server.jewo.de
212.23.129.118	A	bo-jewo-fw01.de.tmr.net
212.23.129.121	A	sdsl-129-121.customer.tmr.net
212.23.129.130	A+PTR	bo-niggemann-fw01.de.tmr.net
212.23.129.130	A	servicedesk-ttc.de
212.23.129.130	A	servicedesk-ttc.com
212.23.129.170	A	bochum.stredich.de
212.23.129.178	A+PTR	ns01.spaixx.eu
212.23.129.187	PTR	mail.stahlwerke-bochum.com
212.23.129.187	A	mail.autoteile-klostermann.de
212.23.129.204	A	insolutions-technologies.de
212.23.129.210	A	gatekeeper.ruhrpumpen.de
212.23.129.211	A+PTR	mx.ruhrpumpen.de
212.23.129.218	A	intrelay.video-atlantis.de
212.23.129.219	A	rechner2.video-atlantis.de
212.23.129.220	A	rechner3.video-atlantis.de
212.23.129.221	A	rechner4.video-atlantis.de
212.23.129.222	A	rechner5.video-atlantis.de
212.23.129.225	PTR	ge-1-1-4-2.bo-stwhv-cr001.de.tmr.net
212.23.129.225	A	sdsl-129-225.customer.tmr.net
212.23.129.226	A+PTR	mail.tum-bochum.de
212.23.129.235	A	mail.vogelsang.com