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Ip to country. Whois made in Java. 3MB in Memory DB - totally fast!!
...It takes 30 sec to compile. 10 minutes to download the data files. 5-15 minutes to build the "jwhois / java" - data file for in memory database. 3 secs to startup and read the in memory database after restart. 0.0001 ms to make a lookup!!!
B)
RipeIpService.lookUp( IP - address) gives "All info like whois command" (Just only for RIPE's IPs - not all IP-addresses in the world)
Is only tested on Linux and Mac. But with the source code, it should not be hard to change the path's to Windows.
More info:
http://whois.less-is-more.dk/