Robtex

Up: 78.136.80.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 78.136.80.0/23
Down right: 78.136.82.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
78.136.80.133	A	dcalvillo.airenetworks.es
78.136.82.108	A	r1.sn-nxg8pivnupob-8ajl.googlevideo.com
78.136.82.110	A	r3.sn-nxg8pivnupob-8ajl.googlevideo.com
78.136.82.244	A	mirror.airenetworks.es
78.136.83.2	PTR	smtp.isotader.com
78.136.83.26	PTR	correo.kelme.es
78.136.83.26	A	smtp.kelme.es
78.136.83.26	A	srvexchange.kelme.com
78.136.83.82	A	ns.nextcomunicaciones.com
78.136.83.82	A	ns1.nextcomunicaciones.com
78.136.83.82	A	ns2.nextcomunicaciones.com
78.136.83.250	A	bossimoda.com.es