Robtex

Up: 91.102.240.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 91.102.240.0/22
Down right: 91.102.244.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
91.102.240.2	PTR	mx.sodefesa.es
91.102.240.2	A	sodefesa.tussam.es
91.102.240.2	A	correo.sodefesa.es
91.102.240.3	A	sigrid1.sodefesa.es
91.102.240.4	PTR	ns1.sodefesa.es
91.102.240.10	PTR	mx1.sodefesa.es
91.102.240.10	PTR	mxforti.sodefesa.es
91.102.240.15	A+PTR	sodemail.sodefesa.es
91.102.240.20	PTR	andromeda.sodefesa.es
91.102.240.20	A	mail.lanser.es
91.102.240.21	PTR	mail21.sodefesa.es
91.102.240.223	PTR	zeus.sodefesa.es
91.102.241.10	A	sodefesa2.tussam.es
91.102.241.24	A+PTR	correo.firstoutlet.com
91.102.241.35	PTR	avdigitalhispania.sodefesa.es
91.102.241.46	PTR	aldesa.sodefesa.es
91.102.241.61	PTR	educapolis.sodefesa.es
91.102.241.61	A	soundtracs.es
91.102.241.62	PTR	eneo.sodefesa.es
91.102.241.76	PTR	cppisa.sodefesa.es
91.102.241.76	PTR	cppisa.parquepisa.org
91.102.241.83	PTR	sodep1d2.sodefesa.es
91.102.243.118	PTR	nave1.arietesodefesa.es
91.102.243.227	PTR	mod2-1.arietesodefesa.es
91.102.245.10	PTR	ubnt5.sodefesa.es
91.102.245.12	PTR	medinamedia.sodefesa.es
91.102.245.13	PTR	aea.sodefesa.es
91.102.245.18	PTR	canalluz.sodefesa.es
91.102.247.252	A+PTR	mxmairena.mairenadelaljarafe.org