Robtex

Up: 87.216.16.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 87.216.16.0/23
Down right: 87.216.18.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
87.216.16.1	PTR	1.16.216.87.static.jazztel.es
87.216.16.42	A+PTR	42.16.216.87.static.jazztel.es
87.216.16.45	A	45.16.216.87.static.jazztel.es
87.216.16.50	A+PTR	50.16.216.87.static.jazztel.es
87.216.16.50	A	acorreo.aljamir.com
87.216.16.70	A	teirlogingenieria.com
87.216.16.73	PTR	73.16.216.87.static.jazztel.es
87.216.16.80	A	mail.corredordeseguros.org
87.216.16.81	A	backliners.net
87.216.16.113	A	smtp.alliancefrancaisemadrid.net
87.216.16.195	A	www.orlicor.com
87.216.16.209	A+PTR	209.16.216.87.static.jazztel.es
87.216.16.224	A	mail.tiendaocasion.com
87.216.16.239	A	239.16.216.87.static.jazztel.es
87.216.17.22	PTR	22.17.216.87.static.jazztel.es
87.216.17.22	A	abrefacil.es
87.216.17.32	A	mx1.luike.com
87.216.17.35	A+PTR	35.17.216.87.static.jazztel.es
87.216.17.35	A	mrhide.entorno-digital.com
87.216.17.35	A	mrhide.entornodigital.com
87.216.17.42	A	42.17.216.87.static.jazztel.es
87.216.17.44	PTR	44.17.216.87.static.jazztel.es
87.216.17.44	A	www.easyparking.es
87.216.17.44	A	mail.cncpro.es
87.216.17.62	A	62.17.216.87.static.jazztel.es
87.216.17.81	A	procedo.es
87.216.17.81	A	incedere.es
87.216.17.114	A	exchange.normanbroadbent.es
87.216.17.122	PTR	122.17.216.87.static.jazztel.es
87.216.17.122	A	mail.enecworld.com
87.216.17.165	A	165.17.216.87.static.jazztel.es
87.216.17.178	A	178.17.216.87.static.jazztel.es
87.216.17.193	A+PTR	193.17.216.87.static.jazztel.es
87.216.17.196	PTR	196.17.216.87.static.jazztel.es
87.216.17.211	A	sanchezdelablanca.net
87.216.18.9	PTR	9.18.216.87.static.jazztel.es
87.216.18.9	A	*.segurosparis.com
87.216.18.9	A	mail.bodynova.es
87.216.18.31	A+PTR	31.18.216.87.static.jazztel.es
87.216.18.69	A+PTR	69.18.216.87.static.jazztel.es
87.216.18.82	PTR	82.18.216.87.static.jazztel.es
87.216.18.82	A	ellokal.org
87.216.18.82	A	mx.probeta.net
87.216.18.97	A+PTR	97.18.216.87.static.jazztel.es
87.216.18.107	A+PTR	107.18.216.87.static.jazztel.es
87.216.18.124	A	correo.aliven.com
87.216.18.125	A+PTR	125.18.216.87.static.jazztel.es
87.216.18.129	PTR	129.18.216.87.static.jazztel.es
87.216.18.129	A	anabiol.net
87.216.18.157	A+PTR	157.18.216.87.static.jazztel.es
87.216.18.157	A	mail.ilertec.info
87.216.18.159	PTR	159.18.216.87.static.jazztel.es
87.216.18.168	PTR	168.18.216.87.static.jazztel.es
87.216.18.168	A	sediainvestiga.es
87.216.18.173	A+PTR	173.18.216.87.static.jazztel.es
87.216.18.176	A	176.18.216.87.static.jazztel.es
87.216.18.187	A+PTR	187.18.216.87.static.jazztel.es
87.216.18.200	A	mail2.mayolas.cat
87.216.18.200	A	mail.mayolas.cat
87.216.18.209	A	209.18.216.87.static.jazztel.es
87.216.18.229	PTR	229.18.216.87.static.jazztel.es
87.216.18.229	A	mail.nivell10.net
87.216.18.229	A	mail.nivell10.com
87.216.18.245	A	doblepunto.net
87.216.19.20	A	pm-ix4.com
87.216.19.34	PTR	34.19.216.87.static.jazztel.es
87.216.19.34	A	guillen.com.es
87.216.19.40	A	40.19.216.87.static.jazztel.es
87.216.19.43	A	mail.emporiuminformatica.cat
87.216.19.43	A	mail.emporiuminformatica.com
87.216.19.57	A	intranet.sentinelcat.com
87.216.19.70	PTR	70.19.216.87.static.jazztel.es
87.216.19.70	A	mail.dietae.com
87.216.19.70	A	dietae.com
87.216.19.72	A	mail.ferrobus.es
87.216.19.72	A	mail.vannir.es
87.216.19.72	A	mail.coccofarm.com
87.216.19.109	A	109.19.216.87.static.jazztel.es
87.216.19.111	A	smtp2.plataformaservicios.com
87.216.19.153	A+PTR	153.19.216.87.static.jazztel.es
87.216.19.153	A	mail.vulkano.org
87.216.19.153	A	mail.vulkano.com
87.216.19.184	A+PTR	184.19.216.87.static.jazztel.es
87.216.19.184	A	ns2.safirserveis.com
87.216.19.185	PTR	185.19.216.87.static.jazztel.es
87.216.19.185	A	kerneldocmail3.ezone.net
87.216.19.185	A	smtp.ezone.net
87.216.19.202	PTR	202.19.216.87.static.jazztel.es
87.216.19.202	A	espaiver.es
87.216.19.240	A	remoto.rpgmanagement.com