Robtex

Up: 87.249.140.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 87.249.141.0/25
Down right: 87.249.141.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
87.249.141.42	PTR	profferplus2.11.sdl.core.ttnet.cz
87.249.141.43	A	pop3.zskratonohy.cz
87.249.141.43	A	zskratonohy.cz
87.249.141.43	A	kserver.zskratonohy.cz
87.249.141.64	A+PTR	kycl.11.sdl.core.ttnet.cz
87.249.141.151	A	jirucha.11.sdl.core.ttnet.cz
87.249.141.251	A	jakrot.11.sdl.core.ttnet.cz
87.249.141.255	PTR	16703.lin.core.ttnet.cz