Robtex

Up: 46.31.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 46.31.48.0/23
Down right: 46.31.50.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
46.31.48.0	PTR	blk-46-31-48-0.brightbase.net
46.31.48.1	A+PTR	r1.tc2.brightbase.net
46.31.48.17	A+PTR	ns1.brightbase.net
46.31.48.18	PTR	ns2.brightbase.net
46.31.48.23	A+PTR	ops.brightbase.net
46.31.48.23	A	operations.brightbase.net
46.31.48.23	A	operations.mailplus.nl
46.31.48.25	PTR	noc.brightbase.net
46.31.48.25	A	as51514.net
46.31.48.33	A	dukediego.nl
46.31.48.34	PTR	hosting.mailplus.nl
46.31.48.34	A	spotler.info
46.31.48.34	A	e-mailmarketingserviceprovider.com
46.31.48.36	A	thuisadministratie.nl
46.31.48.200	A+PTR	ns1.as51514.net
46.31.49.255	PTR	bcast-46-31-49-0.brightbase.net
46.31.50.0	PTR	blk-46-31-50-0.brightbase.net
46.31.50.3	A	pmta3.brightbase.net
46.31.50.4	A+PTR	a1.mailplus.nl
46.31.50.4	A	fip.a1.mailplus.nl
46.31.50.5	A+PTR	m10.mailplus.nl
46.31.50.5	A	wnf2.m10.mailplus.nl
46.31.50.6	PTR	m12.mailplus.nl
46.31.50.7	PTR	m9.mailplus.nl
46.31.50.8	A+PTR	m11.mailplus.nl
46.31.50.8	A	rvo.m11.mailplus.nl
46.31.50.8	A	mainmotivation2.m11.mailplus.nl
46.31.50.9	A	d9.mailplus.nl
46.31.50.11	PTR	m14.mailplus.nl
46.31.50.12	A+PTR	m3.mailplus.nl
46.31.50.12	A	pwn.m3.mailplus.nl
46.31.50.12	A	knvb.m3.mailplus.nl
46.31.50.13	PTR	d17.mailplus.nl
46.31.50.13	A	m19.mailplus.nl
46.31.50.14	PTR	m15.mailplus.nl
46.31.50.15	PTR	m13.mailplus.nl
46.31.50.16	A+PTR	m1.mailplus.nl
46.31.50.16	A	mx1.email-service4.nl
46.31.50.16	A	*.email-service4.nl
46.31.50.17	PTR	m2.mailplus.nl
46.31.50.18	PTR	d12.mailplus.nl
46.31.50.19	PTR	m5.mailplus.nl
46.31.50.20	A+PTR	m7.mailplus.nl
46.31.50.21	A+PTR	m17.mailplus.nl
46.31.50.22	A	images.d14.mailplus.nl
46.31.50.22	A	myfood.d14.mailplus.nl
46.31.50.23	A+PTR	services.mailplus.nl
46.31.50.23	A	return.flowmailer.net
46.31.50.23	A	bounces.mailplus.nl
46.31.50.24	A+PTR	services.mailplus.nl
46.31.50.24	A	return.flowmailer.net
46.31.50.24	A	c1ic.com
46.31.50.28	A	test.mailplus.nl
46.31.50.32	A+PTR	demo2.mailplus.nl
46.31.50.33	A	ziggo.mailplus.nl
46.31.50.35	PTR	e1.mailplus.nl
46.31.50.36	A	lb1.brightbase.net
46.31.50.37	A	lb2.brightbase.net
46.31.50.40	PTR	lb1.brightbase.net
46.31.50.40	A	mail.blinker.nl
46.31.50.40	A	mx1.mailplus.nl
46.31.50.41	PTR	web.brightbase.net
46.31.50.41	A	mail.blinker.nl
46.31.50.41	A	mx1.mailplus.nl
46.31.50.48	A+PTR	client.mailplus.nl
46.31.50.50	A	login.mailplus.nl
46.31.50.51	A	liferay.mailplus.nl
46.31.50.53	A	demo.mailplus.nl
46.31.50.55	A+PTR	m16.mailplus.nl
46.31.50.55	A	univeverzekeringen.m16.mailplus.nl
46.31.50.56	A+PTR	m4.mailplus.nl
46.31.50.56	A	kameraexpress.m4.mailplus.nl
46.31.50.56	A	pensioenfondshc.m4.mailplus.nl
46.31.50.57	PTR	m8.mailplus.nl
46.31.50.57	A	parkmobile.m8.mailplus.nl
46.31.50.58	PTR	m6.mailplus.nl
46.31.50.59	PTR	m18.mailplus.nl
46.31.50.65	A+PTR	e4.mailplus.nl
46.31.50.66	PTR	web.brightbase.net
46.31.50.66	A	mail.blinker.nl
46.31.50.66	A	mx1.mailplus.nl
46.31.50.67	PTR	lb4.brightbase.net
46.31.50.67	A	mail.blinker.nl
46.31.50.67	A	mx1.mailplus.nl
46.31.50.68	PTR	e2.mailplus.nl
46.31.50.69	A+PTR	e3.mailplus.nl
46.31.50.71	A+PTR	mx.mailplus.nl
46.31.50.71	A	mx.blinker.nl
46.31.50.72	A+PTR	e8.mailplus.nl
46.31.50.72	A	files.e8.mailplus.nl
46.31.50.72	A	images.e8.mailplus.nl
46.31.50.90	A+PTR	hosting01.mailplus.nl
46.31.50.90	A	mailplus.tv
46.31.50.90	A	www.mailplus.tv
46.31.50.145	A+PTR	api.flowmailer.net
46.31.50.145	A	vandijkedu.hosting.flowmailer.net
46.31.50.145	A	web.flowmailer.net
46.31.50.146	A+PTR	api.flowmailer.net
46.31.50.146	A	vandijkedu.hosting.flowmailer.net
46.31.50.146	A	web.flowmailer.net
46.31.50.147	A+PTR	api.flowmailer.net
46.31.50.147	A	vandijkedu.hosting.flowmailer.net
46.31.50.147	A	web.flowmailer.net
46.31.50.148	A+PTR	api.flowmailer.net
46.31.50.148	A	vandijkedu.hosting.flowmailer.net
46.31.50.148	A	web.flowmailer.net
46.31.50.201	A+PTR	hosting01.spotler.net
46.31.50.202	A+PTR	hosting02.mailplus.nl
46.31.50.202	A	mx.spotler.net
46.31.50.203	A+PTR	hosting03.spotler.net
46.31.50.211	PTR	hosting-vip01.mailplus.nl
46.31.50.211	A	e-mailmarketingserviceprovider.com
46.31.50.211	A	inboundmarketingplan.nl
46.31.50.212	A	spotlermomentje.com
46.31.50.212	A	baseplus.eu
46.31.50.212	A	as51514.co.uk
46.31.51.35	A	clicks.mailplus.nl
46.31.51.35	A	nieuws.evo.nl
46.31.51.36	A	clicks.mailplus.nl
46.31.51.36	A	nieuws.evo.nl
46.31.51.37	A	clicks.mailplus.nl
46.31.51.37	A	nieuws.evo.nl
46.31.51.38	A	clicks.mailplus.nl
46.31.51.38	A	nieuws.evo.nl
46.31.51.251	PTR	fw1.tc2.brightbase.net
46.31.51.255	PTR	bcast-46-31-50-0.brightbase.net