Robtex

Up: 77.87.48.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 77.87.48.0/22
Down right: 77.87.52.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
77.87.48.0	PTR	berlin.freifunk.net
77.87.48.3	PTR	vpn02.berlin.freifunk.net
77.87.48.3	A	icvpn01.berlin.freifunk.net
77.87.48.3	A	vpn.berlin.freifunk.net
77.87.48.4	A	wriezenerbahnhof.de
77.87.48.4	A	wriezenerpark.de
77.87.48.9	A+PTR	ns2.webwriters.de
77.87.48.9	A	ns2.leo34.net
77.87.48.10	A	vpn03.berlin.freifunk.net
77.87.48.13	A	friendica.berlin.freifunk.net
77.87.48.16	PTR	weimarnetz.de
77.87.48.18	PTR	server.weimarnetz.de
77.87.48.19	A+PTR	weimarnetz.de
77.87.48.19	A	*.weimarnetz.de
77.87.48.19	A	mx2.weimarnetz.de
77.87.48.25	A	friggelei.de
77.87.48.26	A+PTR	sj.weimarnetz.de
77.87.48.26	A	team-erfurt.de
77.87.48.27	A	mail.guerillamesh.net
77.87.48.32	PTR	weimarnetz.de
77.87.48.34	A+PTR	dyn.weimarnetz.de
77.87.48.34	A	ns.dyn.weimarnetz.de
77.87.48.35	PTR	server.weimarnetz.de
77.87.48.38	A	sqrt.weimarnetz.de
77.87.48.41	PTR	mail.foc.is
77.87.48.59	PTR	server-wlan.berlin.freifunk.net
77.87.48.97	PTR	to-be-assigned.vpn.berlin.freifunk.net
77.87.48.163	PTR	ip163.vpn03.berlin.freifunk.net
77.87.48.170	PTR	ip170.vpn03.berlin.freifunk.net
77.87.48.184	PTR	not-in-use.berlin.freifunk.net
77.87.49.10	PTR	ip10.ff-gw.freifunk.net
77.87.49.11	PTR	ip11.ff-gw.freifunk.net
77.87.49.66	A	vpn03.berlin.freifunk.net
77.87.49.68	A	vpn03.berlin.freifunk.net
77.87.49.80	PTR	not-in-use.berlin.freifunk.net
77.87.50.3	A	vpn03.berlin.freifunk.net
77.87.55.24	PTR	republica.berlin.freifunk.net