Robtex

Up: 81.23.192.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 81.23.208.0/21
Down right: 81.23.216.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.23.208.9	A	ns2.telstra.co.uk
81.23.208.92	A	mail2.aqueductplc.com
81.23.208.92	A	*.aqueductplc.com
81.23.208.133	PTR	mail.annecto.com
81.23.208.133	A	sharee.info
81.23.208.133	A	odedra.info
81.23.208.137	A	1stoptele.com
81.23.209.17	A+PTR	mail-relay4.advorto.com
81.23.209.18	A	mail-relay3.advorto.com
81.23.209.20	PTR	mail-relay.advorto.com
81.23.209.50	PTR	d081023209050.cable.ogaki-tv.ne.jp
81.23.209.50	A	drday.co.uk
81.23.209.50	A	day-trippers.co.uk
81.23.209.84	A	uk-lbg.advorto.com
81.23.209.90	A	bountyportal.com
81.23.209.105	A	uk.advorto.com
81.23.209.146	A	desktext.mobi
81.23.209.146	A	desktext.com
81.23.209.152	A	centerparcs.jobs
81.23.209.159	A	virgintrainscareers.co.uk
81.23.209.161	A	oup.advorto.com
81.23.209.161	A	ukjobs.oup.com
81.23.209.163	A	pic.advorto.com
81.23.209.166	A	lbgjobshop.advorto.com
81.23.209.190	A	reference.advorto.com
81.23.209.191	A	refer.advorto.com
81.23.209.239	A	mail.ethesis.co.uk
81.23.209.239	A	ethesis.co.uk
81.23.211.202	A	vcube2.telstra.co.uk
81.23.212.1	A	telstra-hsrp.didata.com
81.23.212.2	A	telstra.didata.com
81.23.212.10	A	uktabfw1.didata.com
81.23.212.20	A	uktabgsoainternetfw1.didata.com
81.23.212.21	A	uktabgsoavpn2.didata.com
81.23.212.22	A	uktabgsoavpn1.didata.com
81.23.212.24	A	v2portal.didata.com
81.23.212.45	A	uktabsvts01.didata.com
81.23.212.51	A	moras.fr.didata.com
81.23.212.53	A	vpnvrfrouter.didata.com
81.23.212.58	A	livecomms.didata.com
81.23.212.114	A	centra.didata.com
81.23.212.115	A	mslearning.didata.com
81.23.212.198	A	uktabswout2.didata.com
81.23.212.199	A	uktabswout1.didata.com
81.23.212.200	A	uktabfw2.didata.com
81.23.212.249	A	wiredd2.didata.com
81.23.212.250	A	wiredd3.didata.com
81.23.212.250	A	didata.com.au
81.23.212.250	A	comtech.com.au
81.23.213.11	PTR	d081023213011.cable.ogaki-tv.ne.jp
81.23.214.83	A	transitionimpact.com
81.23.214.91	A	safe-talk.net
81.23.214.92	PTR	ut002.con-flab.co.uk
81.23.214.92	A	liquid-listings.com
81.23.214.92	A	2ip.co.uk