Block ip access from whole region (or country)

[Daniel Mester]

Hi all, i was just wondering is there any service that i can use to block users from some regions - i mean if i do know user's ip address (i guess it is not faked one or proxied) can i use some service that will approve that user comes from region (or country) he is saying so? And further - can i block users access from specified countries by ip blocks? Anything like that? Thanks a lot.    Daniel.