Robtex

Up: 91.220.42.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 91.220.42.0/25
Down right: 91.220.42.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
91.220.42.1	A+PTR	servicea.mimecast.com
91.220.42.2	A	service1.mimecast.com
91.220.42.2	A	service3.mimecast.com
91.220.42.2	A	mail.callaghans.co.uk
91.220.42.3	PTR	service5.mimecast.com
91.220.42.4	A+PTR	service7.mimecast.com
91.220.42.5	PTR	service9.mimecast.com
91.220.42.6	PTR	service11.mimecast.com
91.220.42.6	A	mail.keoghs.co.uk
91.220.42.7	A+PTR	service13.mimecast.com
91.220.42.8	A	service15.mimecast.com
91.220.42.8	A	mail.quantica.co.uk
91.220.42.8	A	mail.kellangroup.co.uk
91.220.42.9	PTR	service17.mimecast.com
91.220.42.10	PTR	service19.mimecast.com
91.220.42.10	A	mail.futureshg.co.uk
91.220.42.10	A	mail.futureshg.com
91.220.42.11	A+PTR	service21.mimecast.com
91.220.42.13	A+PTR	service25.mimecast.com
91.220.42.14	PTR	service27.mimecast.com
91.220.42.15	A+PTR	service29.mimecast.com
91.220.42.16	PTR	service31.mimecast.com
91.220.42.17	PTR	service33.mimecast.com
91.220.42.18	A+PTR	service35.mimecast.com
91.220.42.18	A	mail.christiecorporate.com
91.220.42.18	A	mail.christieci.com
91.220.42.19	A+PTR	service37.mimecast.com
91.220.42.20	PTR	service39.mimecast.com
91.220.42.20	A	smtp.nosecondnightout.org.uk
91.220.42.20	A	smtp.nsno-oxford.org
91.220.42.22	A+PTR	service43.mimecast.com
91.220.42.23	A+PTR	service45.mimecast.com
91.220.42.23	A	mailserver.lept-eu.org
91.220.42.24	A+PTR	service47.mimecast.com
91.220.42.25	PTR	service49.mimecast.com
91.220.42.26	A+PTR	service51.mimecast.com
91.220.42.27	A+PTR	service53.mimecast.com
91.220.42.28	A	mail.aspectit.net
91.220.42.28	A	service55.mimecast.com
91.220.42.29	PTR	service57.mimecast.com
91.220.42.30	PTR	service59.mimecast.com
91.220.42.30	A	mail6.ommphotographic.com
91.220.42.31	A+PTR	service61.mimecast.com
91.220.42.32	A+PTR	service63.mimecast.com
91.220.42.32	A	mailserver.ventcroft.co.uk
91.220.42.32	A	mailserver.ventcroft.com
91.220.42.33	A	service65.mimecast.com
91.220.42.34	A+PTR	service67.mimecast.com
91.220.42.35	A	service69.mimecast.com
91.220.42.36	A+PTR	service71.mimecast.com
91.220.42.36	A	mail2.villageurbanresorts.com
91.220.42.37	PTR	service73.mimecast.com
91.220.42.37	A	smtpjournal.gccinnova.co.uk
91.220.42.38	A	smtpjournal.temperaturecontrol.co.uk
91.220.42.38	A	mx1-amservices.conosco.net
91.220.42.38	A	mail.converge-it.net
91.220.42.39	A	service77.mimecast.com
91.220.42.41	PTR	service81.mimecast.com
91.220.42.42	A	service83.mimecast.com
91.220.42.43	A+PTR	service85.mimecast.com
91.220.42.44	PTR	service87.mimecast.com
91.220.42.44	A	mx1.cnc-ltd.co.uk
91.220.42.44	A	ns.vekos-irk.ru
91.220.42.45	PTR	service89.mimecast.com
91.220.42.46	A+PTR	service91.mimecast.com
91.220.42.47	A+PTR	service93.mimecast.com
91.220.42.48	PTR	service95.mimecast.com
91.220.42.49	A	service97.mimecast.com
91.220.42.50	A+PTR	service99.mimecast.com
91.220.42.51	PTR	service101.mimecast.com
91.220.42.52	A	smtp2.nexusvm.com
91.220.42.52	A	mail.nashtech.com
91.220.42.52	A	mx1.nashtech.com
91.220.42.53	A+PTR	service105.mimecast.com
91.220.42.54	A+PTR	service107.mimecast.com
91.220.42.54	A	mail.kimal.co.uk
91.220.42.55	A+PTR	service109.mimecast.com
91.220.42.55	A	mx1.ultra-aep.com
91.220.42.56	A	mx1.moneysupermarket.com
91.220.42.56	A	service111.mimecast.com
91.220.42.57	PTR	service113.mimecast.com
91.220.42.58	A+PTR	service115.mimecast.com
91.220.42.59	A+PTR	service117.mimecast.com
91.220.42.59	A	mail.aesseal.co.uk
91.220.42.60	A+PTR	service-uk.mimecast.com
91.220.42.61	A+PTR	webmail-uk.mimecast.com
91.220.42.61	A	webmail.mimecast.com
91.220.42.62	PTR	msbuk.mimecast.com
91.220.42.63	A+PTR	eu-api.mimecast.com
91.220.42.63	A	service1.mimecast.com
91.220.42.63	A	mail.callaghans.co.uk
91.220.42.64	A	mso4-alpha.mimecast.com
91.220.42.65	A	mso4-uk.mimecast.com
91.220.42.66	A+PTR	service119.mimecast.com
91.220.42.67	A+PTR	service121.mimecast.com
91.220.42.68	A+PTR	service123.mimecast.com
91.220.42.69	A+PTR	service125.mimecast.com
91.220.42.70	PTR	dnsredirect-tel-alpha.mimecast.com
91.220.42.70	A	service127.mimecast.com
91.220.42.71	A+PTR	service129.mimecast.com
91.220.42.71	A	mx1.citysprint.co.uk
91.220.42.72	A+PTR	service131.mimecast.com
91.220.42.74	A	xdk-alpha.mimecast.com
91.220.42.76	A	security-eu.mimecast.com
91.220.42.77	PTR	service133.mimecast.com
91.220.42.78	A	service135.mimecast.com
91.220.42.79	A+PTR	service137.mimecast.com
91.220.42.80	A+PTR	service139.mimecast.com
91.220.42.81	PTR	service141.mimecast.com
91.220.42.81	A	e.deals.express.co.uk
91.220.42.81	A	mailserver.sdlcrecruitment.com
91.220.42.82	PTR	service143.mimecast.com
91.220.42.82	A	mail.dovesgatwick.com
91.220.42.82	A	mail.swindonmotorpark.co.uk
91.220.42.83	A+PTR	service145.mimecast.com
91.220.42.84	A+PTR	service147.mimecast.com
91.220.42.85	A+PTR	service149.mimecast.com
91.220.42.86	A	service151.mimecast.com
91.220.42.87	A+PTR	service153.mimecast.com
91.220.42.88	A+PTR	service155.mimecast.com
91.220.42.89	A+PTR	service157.mimecast.com
91.220.42.90	A+PTR	service159.mimecast.com
91.220.42.91	A+PTR	service161.mimecast.com
91.220.42.92	A+PTR	service163.mimecast.com
91.220.42.95	A+PTR	service169.mimecast.com
91.220.42.96	A+PTR	service171.mimecast.com
91.220.42.97	A+PTR	service173.mimecast.com
91.220.42.97	A	mail1.universalworldevents.com
91.220.42.97	A	mail.ashfieldin2focus.com
91.220.42.98	A+PTR	service175.mimecast.com
91.220.42.99	A	service177.mimecast.com
91.220.42.100	A+PTR	service179.mimecast.com
91.220.42.101	A+PTR	service-alpha-uk.mimecast.com
91.220.42.101	A	service-alpha-uk-a.mimecast.com
91.220.42.101	A	service-alpha-uk-b.mimecast.com
91.220.42.102	A+PTR	service181.mimecast.com
91.220.42.102	A	mail.snsgroup.net
91.220.42.104	A	service185.mimecast.com
91.220.42.105	A+PTR	service187.mimecast.com
91.220.42.106	PTR	service189.mimecast.com
91.220.42.107	PTR	service191.mimecast.com
91.220.42.108	A+PTR	service193.mimecast.com
91.220.42.109	A+PTR	service195.mimecast.com
91.220.42.110	A+PTR	service197.mimecast.com
91.220.42.111	A+PTR	service199.mimecast.com
91.220.42.113	A+PTR	service203.mimecast.com
91.220.42.114	A+PTR	service205.mimecast.com
91.220.42.115	A+PTR	service207.mimecast.com
91.220.42.116	A+PTR	service209.mimecast.com
91.220.42.117	A+PTR	service211.mimecast.com
91.220.42.118	A+PTR	service213.mimecast.com
91.220.42.119	PTR	service215.mimecast.com
91.220.42.120	PTR	service217.mimecast.com
91.220.42.121	PTR	service219.mimecast.com
91.220.42.122	A+PTR	service183.mimecast.com
91.220.42.123	A+PTR	sandbox-api.mimecast.com
91.220.42.124	A+PTR	service1-sandbox.mimecast.com
91.220.42.125	A+PTR	webmail-sandbox.mimecast.com
91.220.42.126	A+PTR	service-sandbox.mimecast.com
91.220.42.127	A+PTR	sandbox-smtp-1.mimecast.com
91.220.42.127	A	sandbox-smtp-2.mimecast.com
91.220.42.128	A+PTR	muau-alpha.mimecast.com
91.220.42.129	A	comsec.login-uk.mimecast.com
91.220.42.135	PTR	eu-smtp-2.mimecast.com
91.220.42.135	A+PTR	eu-smtp-1.mimecast.com
91.220.42.136	A+PTR	eu-smtp-inbound-2.mimecast.com
91.220.42.136	A+PTR	eu-smtp-inbound-1.mimecast.com
91.220.42.137	A+PTR	eu-smtp-outbound-2.mimecast.com
91.220.42.137	A+PTR	eu-smtp-outbound-1.mimecast.com
91.220.42.138	A	eu-smtp-journal-1.mimecast.com
91.220.42.138	A	eu-smtp-journal-2.mimecast.com
91.220.42.139	A+PTR	eu-smtp-o365-outbound-1.mimecast.com
91.220.42.139	PTR	eu-smtp-o365-outbound-2.mimecast.com
91.220.42.140	A+PTR	eu-smtp-delivery-2.mimecast.com
91.220.42.141	A+PTR	eu-smtp-delivery-3.mimecast.com
91.220.42.141	A	eu-smtp-outbound3.mimecast.com
91.220.42.142	A+PTR	eu-smtp-delivery-4.mimecast.com
91.220.42.143	A+PTR	eu-smtp-delivery-5.mimecast.com
91.220.42.143	A	eu-smtp-outbound5.mimecast.com
91.220.42.144	A+PTR	eu-smtp-delivery-6.mimecast.com
91.220.42.146	A+PTR	webmail-uk.mimecast.com
91.220.42.146	A	webmail.mimecast.com
91.220.42.147	A+PTR	eu-smtp-delivery-1-backup.mimecast.com
91.220.42.151	PTR	service221.mimecast.com
91.220.42.152	PTR	service223.mimecast.com
91.220.42.153	PTR	service225.mimecast.com
91.220.42.154	PTR	service227.mimecast.com
91.220.42.155	PTR	service229.mimecast.com
91.220.42.156	PTR	service231.mimecast.com
91.220.42.157	PTR	service233.mimecast.com
91.220.42.158	PTR	service235.mimecast.com
91.220.42.159	PTR	service237.mimecast.com
91.220.42.160	A	eu-smtp-inbound-psc-2.mimecast.com
91.220.42.160	A	eu-smtp-inbound-psc-1.mimecast.com
91.220.42.161	PTR	service241.mimecast.com
91.220.42.162	PTR	service243.mimecast.com
91.220.42.165	PTR	service249.mimecast.com
91.220.42.166	PTR	service251.mimecast.com
91.220.42.167	PTR	service253.mimecast.com
91.220.42.169	PTR	service257.mimecast.com
91.220.42.170	PTR	service259.mimecast.com
91.220.42.171	A+PTR	eu-smtp-1.mimecast.com
91.220.42.171	PTR	eu-smtp-2.mimecast.com
91.220.42.172	A+PTR	eu-smtp-inbound-1.mimecast.com
91.220.42.172	A+PTR	eu-smtp-inbound-2.mimecast.com
91.220.42.173	PTR	service265.mimecast.com
91.220.42.173	A	eu-smtp-outbound-2.mimecast.com
91.220.42.173	A	eu-smtp-outbound-1.mimecast.com
91.220.42.174	PTR	service267.mimecast.com
91.220.42.174	A	eu-smtp-journal-1.mimecast.com
91.220.42.174	A	eu-smtp-journal-2.mimecast.com
91.220.42.175	PTR	service269.mimecast.com
91.220.42.175	A	eu-smtp-o365-outbound-1.mimecast.com
91.220.42.177	A	eu-res-1.mimecast.com
91.220.42.195	PTR	eu-smtp-2.mimecast.com
91.220.42.195	A+PTR	eu-smtp-1.mimecast.com
91.220.42.196	A+PTR	eu-smtp-inbound-1.mimecast.com
91.220.42.196	A+PTR	eu-smtp-inbound-2.mimecast.com
91.220.42.197	A+PTR	eu-smtp-outbound-1.mimecast.com
91.220.42.197	A+PTR	eu-smtp-outbound-2.mimecast.com
91.220.42.198	A	eu-smtp-journal-1.mimecast.com
91.220.42.198	A	eu-smtp-journal-2.mimecast.com
91.220.42.199	PTR	eu-smtp-o365-outbound-2.mimecast.com
91.220.42.199	A+PTR	eu-smtp-o365-outbound-1.mimecast.com
91.220.42.201	A+PTR	eu-smtp-inbound-1.mimecast.com
91.220.42.201	A+PTR	eu-smtp-inbound-2.mimecast.com
91.220.42.201	A	mx1-amservices.conosco.net
91.220.42.202	A+PTR	eu-smtp-outbound-1.mimecast.com
91.220.42.202	A+PTR	eu-smtp-outbound-2.mimecast.com
91.220.42.203	A+PTR	eu-smtp-journal-2.mimecast.com
91.220.42.203	A+PTR	eu-smtp-journal-1.mimecast.com
91.220.42.204	A+PTR	eu-smtp-o365-outbound-1.mimecast.com
91.220.42.204	A+PTR	eu-smtp-o365-outbound-2.mimecast.com
91.220.42.204	A	eu-smtp-inbound.mimecast.com
91.220.42.205	A+PTR	eu-smtp-delivery-7.mimecast.com
91.220.42.210	A+PTR	eu-smtp-1.mimecast.com
91.220.42.210	A+PTR	eu-smtp-2.mimecast.com
91.220.42.210	A	mail.hondadealermarketing.com
91.220.42.211	A+PTR	eu-smtp-inbound-1.mimecast.com
91.220.42.211	A+PTR	eu-smtp-inbound-2.mimecast.com
91.220.42.211	A	mx1-amservices.conosco.net
91.220.42.212	A+PTR	eu-smtp-outbound-1.mimecast.com
91.220.42.212	A+PTR	eu-smtp-outbound-2.mimecast.com
91.220.42.213	A+PTR	eu-smtp-journal-2.mimecast.com
91.220.42.213	A+PTR	eu-smtp-journal-1.mimecast.com
91.220.42.214	A+PTR	eu-smtp-o365-outbound-1.mimecast.com
91.220.42.214	A+PTR	eu-smtp-o365-outbound-2.mimecast.com
91.220.42.214	A	eu-smtp-inbound.mimecast.com
91.220.42.215	A+PTR	eu-api.mimecast.com
91.220.42.215	A	api.mimecast.com
91.220.42.215	A	protect-eu.mimecast.com
91.220.42.218	A	comsec.login-uk.mimecast.com
91.220.42.219	A	login.mimecast.com
91.220.42.220	A+PTR	eu-smtp-1.mimecast.com
91.220.42.220	A+PTR	eu-smtp-2.mimecast.com
91.220.42.220	A	mail.hondadealermarketing.com
91.220.42.221	A+PTR	mpp.mimecast.com
91.220.42.222	A+PTR	mobile.mimecast.com
91.220.42.227	A+PTR	eu-smtp-delivery-1.mimecast.com
91.220.42.227	A	eu-smtp-outbound1.mimecast.com
91.220.42.228	A+PTR	lfs.mimecast.com
91.220.42.229	A+PTR	service-alpha-outbound1.mimecast.com
91.220.42.230	PTR	console-uk.mimecast.com
91.220.42.230	A	webmail.mimecast.com
91.220.42.230	A	webmail-uk.mimecast.com
91.220.42.231	A+PTR	service-alpha-inbound-a.mimecast.com
91.220.42.231	A+PTR	service-alpha-inbound-b.mimecast.com
91.220.42.232	A+PTR	service-alpha-outbound-a.mimecast.com
91.220.42.232	A+PTR	service-alpha-outbound-b.mimecast.com
91.220.42.233	A+PTR	service-alpha-journal-a.mimecast.com
91.220.42.233	A	service-alpha-journal-b.mimecast.com
91.220.42.234	PTR	service-alpha-journal-b.mimecast.com
91.220.42.235	A+PTR	eu-api.mimecast.com
91.220.42.235	A	api.mimecast.com
91.220.42.235	A	protect-eu.mimecast.com
91.220.42.237	A	login.mimecast.com
91.220.42.237	A	login-uk.mimecast.com
91.220.42.240	A+PTR	eu-smtp-1.mimecast.com
91.220.42.240	A+PTR	eu-smtp-2.mimecast.com
91.220.42.240	A	mx2.equimat-international.fr
91.220.42.241	A+PTR	eu-smtp-inbound-1.mimecast.com
91.220.42.241	A+PTR	eu-smtp-inbound-2.mimecast.com
91.220.42.241	A	mx1-sablemining.conosco.net
91.220.42.242	A+PTR	eu-smtp-outbound-1.mimecast.com
91.220.42.242	A+PTR	eu-smtp-outbound-2.mimecast.com
91.220.42.243	A+PTR	eu-smtp-journal-1.mimecast.com
91.220.42.243	A+PTR	eu-smtp-journal-2.mimecast.com
91.220.42.244	A+PTR	eu-smtp-o365-outbound-1.mimecast.com
91.220.42.244	A+PTR	eu-smtp-o365-outbound-2.mimecast.com
91.220.42.244	A	eu-smtp-inbound.mimecast.com
91.220.42.246	A	comsec.login-uk.mimecast.com
91.220.42.247	A	login.mimecast.com
91.220.42.248	A+PTR	security-eu.mimecast.com
91.220.42.249	A	security-eu.mimecast.com