Robtex

Up: 185.53.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 185.53.4.0/23
Down right: 185.53.6.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
185.53.5.45	A	mail.onlysoft.cz
185.53.5.45	A	sevi-stavby.cz
185.53.5.45	A	mail.zemservis.cz
185.53.5.48	PTR	48.5.mach3net.cz
185.53.5.48	A	superfilmy.eu
185.53.5.48	A	wh3.mach3net.cz
185.53.5.49	PTR	49.5.mach3net.cz
185.53.5.241	A	wh1.m3com.cz
185.53.5.242	PTR	242.5.mach3net.cz
185.53.5.242	A	mail.onlysoft.cz
185.53.5.242	A	mail.zemservis.cz