I don't think there is anything country specific about that... maybe this will help a bit.
http://www.nic.gov/help_domainlevels.html

Although they could be Colombian-Indians ;-)


>Thank you Wayne. Can you tell me how to interpret if I receive something from an address like the following
>
>john.doe@abc.co.in
>
>I'd guess that abc would (or could) be the company name but what about the co.in?
>
>From the url you just gave me "in" would be for India. What does the "co" mean?