Robtex

Up: 81.15.232.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 81.15.232.0/23
Down right: 81.15.234.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.15.233.3	PTR	mail.dolnaodra.com.pl
81.15.235.0	PTR	ip-81-15-235-0.unregistered.net.exatel.pl
81.15.235.9	A	ip-81-15-235-9.unregistered.net.exatel.pl
81.15.235.15	PTR	ip-81-15-235-15.unregistered.net.exatel.pl
81.15.235.15	A	mail.denvms.nl
81.15.235.15	A	broadcast.styropian-termoorganika-najtaniej.styropian-elewacyny.pl
81.15.235.16	PTR	ip-81-15-235-16.unregistered.net.exatel.pl
81.15.235.16	A	*.urbanchic.pl
81.15.235.16	A	mail.divero.com.pl
81.15.235.17	PTR	ip-81-15-235-17.unregistered.net.exatel.pl
81.15.235.18	PTR	ip-81-15-235-18.unregistered.net.exatel.pl
81.15.235.22	A	slave.nslokoz.com
81.15.235.29	PTR	ip-81-15-235-29.unregistered.net.exatel.pl
81.15.235.29	A	b12.lokoz.com
81.15.235.29	A	root.lokoz.com
81.15.235.40	PTR	ip-81-15-235-40.unregistered.net.exatel.pl
81.15.235.40	A	restaurant-lediabledesplaisirs.com
81.15.235.40	A	mail.praca-zabrze.org
81.15.235.51	PTR	ip-81-15-235-51.unregistered.net.exatel.pl
81.15.235.51	A	www.mundalia.info
81.15.235.51	A	androidsdk.es
81.15.235.59	PTR	ip-81-15-235-59.unregistered.net.exatel.pl
81.15.235.59	A	elajuardemaria.com
81.15.235.59	A	www.obrozaelektryczna.info
81.15.235.68	PTR	ip-81-15-235-68.unregistered.net.exatel.pl
81.15.235.68	A	roulette-games.info
81.15.235.68	A	ns3843b.xorgs.com
81.15.235.77	PTR	ip-81-15-235-77.unregistered.net.exatel.pl
81.15.235.77	A	citationsbonheur.fr
81.15.235.77	A	sunrisedistributors.com
81.15.235.85	PTR	ip-81-15-235-85.unregistered.net.exatel.pl
81.15.235.85	A	dns207ea.likedns.net
81.15.235.85	A	ns3828b.god4.eu
81.15.235.92	PTR	ip-81-15-235-92.unregistered.net.exatel.pl
81.15.235.92	A	poloznaradzi.pl
81.15.235.92	A	ns4138a.koxs.eu
81.15.235.101	PTR	ip-81-15-235-101.unregistered.net.exatel.pl
81.15.235.101	A	fundacjamiasto.org
81.15.235.101	A	pay-per-click-ppc.com
81.15.235.143	A+PTR	ip-81-15-235-143.unregistered.net.exatel.pl
81.15.235.166	A	ip-81-15-235-166.unregistered.net.exatel.pl
81.15.235.169	A+PTR	ip-81-15-235-169.unregistered.net.exatel.pl
81.15.235.170	A+PTR	ip-81-15-235-170.unregistered.net.exatel.pl
81.15.235.255	PTR	ip-81-15-235-255.unregistered.net.exatel.pl