Robtex

Up: 213.216.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 213.216.32.0/20
Down right: 213.216.48.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
213.216.32.100	A+PTR	pc1.konstrukce.cz
213.216.32.126	A+PTR	mail.orgrez.cz
213.216.32.126	A	brno.orgrez.cz
213.216.32.126	A	mail2.orgrez.cz
213.216.32.226	A	blizzard.netfauna.cz
213.216.32.226	A	netfauna.cz
213.216.33.190	PTR	static-3587711422.poda.cz
213.216.41.150	A	mail.bofb.cz
213.216.45.66	A+PTR	server.zatloukal.net
213.216.45.66	A	mail.zatloukal.net
213.216.45.66	A	zatloukal.net
213.216.46.2	A	remote.trinidon.cz
213.216.46.3	A	trilex.eu
213.216.46.3	A	trinidon.cz
213.216.46.3	A	trinidon.com
213.216.47.154	A	smtp.kotras.eu
213.216.47.163	A	pruvodcezp.cz
213.216.47.163	A	mojeambulance.cz
213.216.47.163	A	mojeambulance.net
213.216.48.7	PTR	static-3587715079.poda.cz
213.216.48.9	PTR	static-3587715081.poda.cz
213.216.48.9	A	play.kiwicraft.eu
213.216.55.106	A+PTR	skola.mendelova.cz
213.216.55.106	A	mail.mendelova.cz