Blocking IP Addresses In .htaccess For Whole Countries

I'm tired of india people hitting our website (because it is a top hit on google and the others) then calling the next day to bug me to use them for outsourcing.

I am going to block some IP blocks in my .htaccess file to prevent this.

I can see from my statcounter logs that the hits from india so far have come from 59.* 102.* and 203.* (as in 59.###.###.###).

Is there a place I can lookup to find out if I block those, will I will also be blocking some north america IPs (since I'm using such a broad wildcard)?

All our paying business comes from north america.

my htaccess file will look like this:

Code:
# prevents a directory listing when typing in the directory path in the browser
Options -Indexes
#
# My effort to keep india sites from seeing our website
order allow,deny
deny from 203.
deny from 59.
allow from all