Just found that http://member.dnsstuff.com/pages/tools.php?ptype=free provides a free tool to provide ip ranges for any country you type in - quite handy for quickly adding offending regions to .htaccess and firewall blocks. Nice free tool.

Jeff,
Great Tool! Thanks for pointing this out. I had strayed away from dnsS because I thought it had turned into a totally paid service.
China and Korea - Goodbye.

Any other countries that have been total spammers?