Robtex

Up: 213.137.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 213.137.4.0/23
Down right: 213.137.6.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
213.137.4.12	A+PTR	iom.miracles.co.im
213.137.4.13	PTR	host213.137.4.13.manx.net
213.137.4.13	A	mail.pcs.im
213.137.4.15	A+PTR	mail.smcs.co.im
213.137.4.25	PTR	host213.137.4.25.manx.net
213.137.4.25	A	mail.onchan.co.im
213.137.4.26	A	mail.ecsinter.com
213.137.4.26	A	mail.bakertillyisleofman.com
213.137.4.26	A	mail.ecs-international.com
213.137.4.42	PTR	host213.137.4.42.manx.net
213.137.4.42	A	mail.fitnessthrulife.com
213.137.4.42	A	mail.fitnessthrulife.org
213.137.4.89	PTR	host213.137.4.89.manx.net
213.137.4.110	PTR	mail.boston.co.im
213.137.4.114	PTR	mail.12finchrd.com
213.137.4.115	PTR	host213.137.4.115.manx.net
213.137.4.116	PTR	host213.137.4.116.manx.net
213.137.4.119	PTR	host213.137.4.119.manx.net
213.137.4.120	PTR	host213.137.4.120.manx.net
213.137.4.139	PTR	host213.137.4.139.manx.net
213.137.4.140	PTR	mail.i.im
213.137.4.148	A	mail.lklaw.co.im
213.137.4.155	PTR	host213.137.4.155.manx.net
213.137.4.185	A	webmail.tuftonoceanic.com
213.137.4.190	A	mail.tuftonoceanic.com
213.137.4.210	A	mail.lgiinvestments.com
213.137.4.216	PTR	host213.137.4.216.manx.net
213.137.4.226	PTR	host213.137.4.226.manx.net
213.137.5.2	A+PTR	mx1.hardinglewis.com
213.137.5.2	A	mail.hardinglewis.com
213.137.5.2	A	mail1.shannoncallister.com
213.137.5.62	A	orrisdale.isleofman.net
213.137.5.107	PTR	carterjonesmcdonald.com
213.137.5.107	A+PTR	douglas.carterjonesmcdonald.com
213.137.5.107	A+PTR	mail.cjm.im
213.137.5.146	PTR	mail.inwardsintl.com
213.137.5.146	A	mail.webresourcesltd.com
213.137.5.146	A	mail.inwardsinternational.com
213.137.5.154	PTR	landplanninggroup.com
213.137.5.154	PTR	lucentgroup.co.uk
213.137.5.154	A	mail.landplanninggroup.com
213.137.5.155	PTR	landplanninggroup.com
213.137.5.155	PTR	lucentgroup.co.uk
213.137.5.171	PTR	mail.ofl.co.im
213.137.5.178	A+PTR	mail.mastercraft-europe.com
213.137.5.178	A	remote.mastercraft-europe.com
213.137.6.4	PTR	dq.im
213.137.6.4	A+PTR	remote.dq.im
213.137.6.4	A	mail.dq.im
213.137.6.9	A	mail.gavanlaw.com
213.137.6.15	A+PTR	mx1.thompson-travel.com
213.137.6.26	A	mail.speygroup.im
213.137.6.31	A+PTR	mail.income-plus.biz
213.137.6.31	PTR	mail.trustedaccounts.com
213.137.6.53	PTR	mail.elegancetaxiservice.com
213.137.6.53	A	elegancetaxiservice-online.com
213.137.6.58	A+PTR	mail.prosearch.co.im
213.137.6.79	A	mail.ramseycrookall.com
213.137.6.79	A	mail2.ramseycrookall.com
213.137.6.85	PTR	mail.apa-iom.com
213.137.6.95	A	mail.hillberrytrust.com
213.137.6.115	A	moo.iomcreameries.com
213.137.6.121	A	mail2.mannageit.com
213.137.6.123	A	newmail.three.fm
213.137.6.123	A	mail.three.fm
213.137.6.128	A	mail.corlettbolton.com
213.137.6.136	A	mx-delivery1.unipressoftware.com
213.137.6.136	A	mx-delivery11.unipressoftware.com
213.137.6.137	PTR	mail.post-a-rose.com
213.137.6.137	A	mail.robinsonsflowers.im
213.137.6.137	A	mail.isleofmanhampers.com
213.137.6.144	A+PTR	mailserver.regencytravelholidays.com
213.137.6.146	A	mail.mpassociates.co.uk
213.137.6.147	A	mail.glenheleninn.com
213.137.6.147	A	mail.islandfacilities.com
213.137.6.180	PTR	remote.ontargetltd.com
213.137.6.187	A+PTR	mail.4hire.co.im
213.137.6.199	A+PTR	mail.krisl.net
213.137.6.199	A	krisl.email
213.137.6.199	A	krisl.co.uk
213.137.6.200	PTR	mail.ardern-druggan.co.uk
213.137.6.210	PTR	mx.simcockspensions.com
213.137.6.210	A	mx.equilibriumpensions.com
213.137.6.212	PTR	mail.sterling.im
213.137.6.214	PTR	iom.phoenixleisure.co.im
213.137.6.214	A	mail.phoenixleisure.co.im
213.137.6.214	A	mx1.danielrodolfi.net
213.137.6.216	PTR	mail.ips2limited.biz
213.137.6.216	PTR	mail.ips2limited.com
213.137.6.216	PTR	mail.ipsumbrella.com
213.137.6.220	A+PTR	mail1.mainstreamfinancial.co.uk
213.137.6.220	A	mail1.mainstreammedia.co.uk
213.137.6.231	A	mail1.betab.com
213.137.6.235	PTR	iom.bmcqs.co.im
213.137.6.240	A+PTR	mail.akwebb.co.uk
213.137.6.242	PTR	mail.dohle-yachts.com
213.137.7.0	A	cellomarine.com
213.137.7.6	PTR	mail.phoenix.im
213.137.7.18	PTR	host213.137.7.18.manx.net
213.137.7.18	A	mail2.winchesterinvoicing.com
213.137.7.18	A	mail2.garrawaytrust.com
213.137.7.23	PTR	host213.137.7.23.manx.net
213.137.7.24	A+PTR	mail.quayside.im
213.137.7.24	A	remedion.net
213.137.7.37	A+PTR	mail.prometic.co.im
213.137.7.37	PTR	host213.137.7.37.manx.net
213.137.7.162	A	mail.charterhouseint.com
213.137.7.163	PTR	host213.137.7.163.manx.net
213.137.7.163	A	mail.horwath.co.im
213.137.7.171	PTR	mail.charterhouseint.com
213.137.7.174	PTR	host213.137.7.174.manx.net
213.137.7.174	A	owa.charterhouseint.com
213.137.7.210	A+PTR	mail.665665.com
213.137.7.210	A+PTR	mail.freeportnetwork.com
213.137.7.210	A+PTR	mail.integrated-capabilities.com
213.137.7.218	A	tesseract.vikingiom.com
213.137.7.219	A	mail.vikingiom.com
213.137.7.233	PTR	host213.137.7.233.manx.net
213.137.7.233	A	ap-vdsl.fildraw.com
213.137.7.233	A	mail.fildraw.com