Tonga
China.
'hr' is the top level country domain code for Croatia.
Slovakia uses .sk as an Internet top-level domain.
Guinea uses .gn for an Internet top-level domain.
.UK is the Internet top-level domain for the United Kingdom, which includes England, Scotland, Wales, and Northern Ireland. In most cases, the Internet domain is the same as the ISO code used for things like currencies, but the UK is an exception. For purposes other than the Internet, the UK uses ISO code GB, as in the currency code GBP.
The Isle of Man uses Internet top-level domain .im
.fr is the country code top-level Internet domain for France.
There is no ISO-3166 country code RF, so there is no Internet .rf domain. However, the Russian Federation uses Internet top-level domain .рф, which is the Cyrillic alphabet letters RF, in addition to the .ru domain.
Scotland does not have its own two-letter ISO country code. It uses UK for the Internet and GB for all other purposes (for example, currency code GBP for UK pounds sterling).
"si" is the country internet code of Slovenia. you can find other code from the following links... http://ftp.ics.uci.edu/pub/websoft/wwwstat/country-codes.txt http://www.science.co.il/Internet-Codes.asp?s=internet
DL is not a valid country code for the Internet.