Robtex

Up: 81.88.30.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 81.88.31.0/25
Down right: 81.88.31.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.88.31.12	PTR	mx2.ausreineminteresse.com
81.88.31.12	A	mail.private4you.net
81.88.31.12	A	private4you.net
81.88.31.13	A	sofortabwixen.com
81.88.31.13	A	mail.sofortabwixen.com
81.88.31.14	A	mail.sofort-abwixen.com
81.88.31.14	A	sofort-abwixen.com
81.88.31.15	A	*.sofortabwixen.net
81.88.31.15	A	mail.sofortabwixen.net
81.88.31.15	A	sofortabwixen.net
81.88.31.16	A	mail.sofort-abwixen.net
81.88.31.16	A	sofort-abwixen.net
81.88.31.17	A	mail.gratis-wixen.com
81.88.31.17	A	gratis-wixen.com
81.88.31.18	A	mail.gratiswixen.com
81.88.31.18	A	gratiswixen.com
81.88.31.19	A	*.gratis-wixen.net
81.88.31.19	A	mail.gratis-wixen.net
81.88.31.19	A	gratis-wixen.net
81.88.31.21	A	deutschlands-heisse-frauen.com
81.88.31.21	A	mail.deutschlands-heisse-frauen.com
81.88.31.22	A	mail.deutschlands-heisse-frauen.net
81.88.31.22	A	deutschlands-heisse-frauen.net
81.88.31.23	A	heiss-und-privat.com
81.88.31.23	A	mail.heiss-und-privat.com
81.88.31.23	A	*.heiss-und-privat.com
81.88.31.24	A	mail.heiss-und-privat.net
81.88.31.24	A	heiss-und-privat.net
81.88.31.25	A	hot-and-private.com
81.88.31.25	A	*.hot-and-private.com
81.88.31.25	A	mail.hot-and-private.com
81.88.31.26	A	*.hot-and-private.net
81.88.31.26	A	mail.hot-and-private.net
81.88.31.26	A	hot-and-private.net
81.88.31.27	A	mail.bring-ihn-zum-gluehen.com
81.88.31.27	A	bring-ihn-zum-gluehen.com
81.88.31.28	A	mail.bring-ihn-zum-gluehen.net
81.88.31.28	A	bring-ihn-zum-gluehen.net
81.88.31.98	A	gswsrvtec.com
81.88.31.98	A	mail.gswsrvtec.com
81.88.31.98	A	*.gswsrvtec.com
81.88.31.103	A	gswsrvtecc.com
81.88.31.103	A	mail.gswsrvtecc.com
81.88.31.108	A	mail.gsw-srvtec.com
81.88.31.108	A	gsw-srvtec.com
81.88.31.113	A	gs-wsrv-tec.com
81.88.31.113	A	mail.gs-wsrv-tec.com
81.88.31.118	A	*.gsw-srv-tec.com
81.88.31.118	A	gsw-srv-tec.com
81.88.31.118	A	mail.gsw-srv-tec.com
81.88.31.123	A	mail.new-srvtec.com
81.88.31.123	A	new-srvtec.com
81.88.31.130	PTR	81.88.31.130.static.clanordns.net
81.88.31.130	A	mail.werbe-newsletter.com
81.88.31.130	A	werbe-newsletter.com
81.88.31.133	A	deine100euro.com
81.88.31.133	A	mail.deine100euro.com
81.88.31.135	A	mail.100euro-gutschrift.com
81.88.31.135	A	100euro-gutschrift.com
81.88.31.136	PTR	81.88.31.136.static.clanordns.net
81.88.31.136	A	mail.doubleprofiler.net
81.88.31.136	A	100euro-gutschein.com
81.88.31.194	A	www.t-shirt-geschenkt.com
81.88.31.194	A	mail.t-shirt-geschenkt.com
81.88.31.194	A	t-shirt-geschenkt.com
81.88.31.196	A	mail.doubleprofiler.com
81.88.31.196	A	doubleprofiler.com