Robtex

Up: 46.31.32.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 46.31.48.0/21
Down right: 46.31.56.0/21
(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	ops.brightbase.net
46.31.48.23	A	operations.brightbase.net
46.31.48.23	A	operations.mailplus.nl
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
46.31.48.200	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	fip.a1.mailplus.nl
46.31.50.4	A	a1.mailplus.nl
46.31.50.5	A	wnf2.m10.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
46.31.50.32	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	A	login.mailplus.nl
46.31.50.40	A	mail.blinker.nl
46.31.50.40	A	mx1.mailplus.nl
46.31.50.41	A	login.mailplus.nl
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
46.31.50.65	A+PTR	e4.mailplus.nl
46.31.50.66	PTR	web.brightbase.net
46.31.50.66	A	login.mailplus.nl
46.31.50.66	A	mail.blinker.nl
46.31.50.67	PTR	lb4.brightbase.net
46.31.50.67	A	login.mailplus.nl
46.31.50.67	A	mail.blinker.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
46.31.51.35	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
46.31.52.0	PTR	blk-46-31-52-0.brightbase.net
46.31.52.1	PTR	smta1.brightbase.net
46.31.52.2	PTR	smta2.brightbase.net
46.31.52.3	PTR	smta3.brightbase.net
46.31.52.4	A	smta4.brightbase.net
46.31.52.5	A	smta5.brightbase.net
46.31.52.6	A	smta6.brightbase.net
46.31.52.7	A	smta7.brightbase.net
46.31.52.19	A+PTR	smta19.brightbase.net
46.31.52.20	A	smta20.brightbase.net
46.31.52.22	A	smta22.brightbase.net
46.31.52.24	A	smta24.brightbase.net
46.31.52.130	A+PTR	smta130.brightbase.net
46.31.52.131	A+PTR	smta131.brightbase.net
46.31.52.132	A	smta132.brightbase.net
46.31.52.133	A	smta133.brightbase.net
46.31.52.144	PTR	smta144.brightbase.net
46.31.53.1	A	dmta1.brightbase.net
46.31.53.5	A	dmta5.brightbase.net
46.31.53.6	A	dmta6.brightbase.net
46.31.53.9	A	dmta9.brightbase.net
46.31.53.18	A	dmta18.brightbase.net
46.31.54.0	PTR	blk-46-31-54-0.brightbase.net
46.31.55.252	PTR	fw1.en2.brightbase.net
46.31.55.255	PTR	bcast-46-31-54-0.brightbase.net
46.31.56.18	A	abonate.goltelevision.com
46.31.56.107	A	lovestv.es
46.31.56.161	A	abra4.abertistelecom.com
46.31.56.165	A	abertissatelites.com
46.31.56.165	A	truckpark.es
46.31.56.165	A	www.smartabertis.com
46.31.56.182	A	abrademo-signup.abertistelecom.com
46.31.56.222	A	www.betvgo.be
46.31.56.222	A	betvgo.be
46.31.56.246	A	abra-registro.abertistelecom.com
46.31.56.248	A	watch.abertistelecom.com
46.31.59.59	A	portal.barcelonawifi.cat
46.31.59.60	A+PTR	s2.bcn.cat