Robtex

Up: 31.40.160.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 31.40.176.0/21
Down right: 31.40.184.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
31.40.176.2	A	dns1.relcomtrade.com
31.40.176.3	A	dns2.relcomtrade.com
31.40.177.3	PTR	31-40-177-3.ivcdon.net
31.40.177.3	A	ns1.mudbugrun.com
31.40.177.4	A	ns2.mudbugrun.com
31.40.178.3	A	ns1.msiafterburner.com
31.40.178.4	A	ns2.msiafterburner.com
31.40.178.37	A+PTR	ae20-11258.smfl-04-bpe1.miranda-media.net
31.40.178.38	A+PTR	ae20-11258.smfl-04-bpe1.miranda-media.net
31.40.179.2	A	smtp146439.msdanisjustsayin.com
31.40.179.3	A	ns1.msdanisjustsayin.com
31.40.179.4	A	ns2.msdanisjustsayin.com
31.40.179.105	A+PTR	ae20-10499.smfl-04-bpe1.miranda-media.net
31.40.179.106	A+PTR	ae20-10499.smfl-04-bpe1.miranda-media.net
31.40.179.107	A+PTR	ae20-10499.smfl-04-bpe1.miranda-media.net
31.40.179.108	A+PTR	ae20-10499.smfl-04-bpe1.miranda-media.net
31.40.179.109	A	ae20-10499.smfl-04-bpe1.miranda-media.net
31.40.179.110	A	ae20-10499.smfl-04-bpe1.miranda-media.net
31.40.179.244	PTR	client-31-40-179-244.m3x.org
31.40.180.2	A	firemaper.com
31.40.180.3	A	ns1.mmolottery.com
31.40.180.4	A	ns2.mmolottery.com
31.40.180.254	A	gw251664.mmolottery.com
31.40.181.20	PTR	client-31-40-181-20.m3x.org
31.40.181.21	PTR	client-31-40-181-21.m3x.org
31.40.181.106	A+PTR	mail.s126-111.news.felicamartinadrs1.com
31.40.182.100	PTR	mail.s127-105.drs.news-am-tag.de
31.40.182.101	PTR	31-40-182-101.ivcdon.net
31.40.182.101	A	mail.s127-106.drs.news-am-tag.de
31.40.183.237	A+PTR	mail.s128-242.mail.norge-nyhetsbrev.com
31.40.184.2	A	ns1.dnsfirefox.com
31.40.184.3	PTR	client-31-40-184-3.m3x.org
31.40.184.3	A	ns2.dnsfnreg.com
31.40.184.3	A	ns2.dnsfirefox.com
31.40.184.4	A	ns1.dnszonehoster.com
31.40.184.125	A	tickeronline.sportworker.com
31.40.184.129	PTR	client-31-40-184-129.m3x.org
31.40.184.129	A	ns1.knetdot.com
31.40.184.129	A	ns1.hugabon.com
31.40.184.174	A	mail.s131-179.news.lemessagedujour.com
31.40.184.224	A	*.sportworker.com
31.40.185.190	A	mail.prom.lg.ua
31.40.188.40	PTR	client-31-40-188-40.m3x.org
31.40.188.127	A	definitewire.com
31.40.188.202	A+PTR	mail.s135-207.ds.femsys.eu
31.40.188.202	A	dns3.bymbombuk.ru
31.40.188.243	A	ns2.gamehorts.at
31.40.189.13	PTR	client-31-40-189-13.m3x.org
31.40.190.23	A	cowardlyindolent.com
31.40.190.213	A	benignstar.com
31.40.191.191	PTR	netline.lg.ua
31.40.191.191	A	*.netline.lg.ua
31.40.191.237	A	distillderivative.com