Click the appropriate link below to select the country of interest (Green marker means that the country is known to be active, red is a previously active, now inactive country or one using HF only for back-up purposes): 

Afghanistan 
Albania 
Algeria 
Angola 
Argentina 
Australia 
Austria 
Bangladesh 
Belgium 
Benin 
Brazil 
Bulgaria 
Canada 
Chile 
China 
Congo (Republic of the Congo) 
Croatia 
Cuba 
Cyprus 
Czech Republic 
Denmark 
Ecuador 
Egypt 
Estonia 
Ethiopia 
Finland 
France 
Germany 
Ghana 
Greece 
Guinea 
Hercegovina 
Hungary 
Iceland 
India 
Indonesia 
Iran 
Iraq 
Ireland 
Israel 
Italy 
Japan 
Kenya 
Kuwait 
Latvia 
Lithuania 
Malaysia 
Malta 
Mexico 
Mongolia 
Morocco 
Netherlands 
New Zealand 
Nigeria 
North Korea 
Norway 
Pakistan 
Peru 
Phillipines 
Poland 
Portugal 
Qatar 
Romania 
Russia 
Senegal 
Serbia 
Singapore 
Slovakia 
Somalia 
Spain 
Sudan 
Sweden 
Switzerland 
Thailand 
Tunisia 
Turkey 
United Kingdom 
United States of America 
Vietnam 
Yemen 
Zaire (Democratic Republic of Congo) 

(Country profiles from the CIA World Factbook at  http://www.cia.gov/cia/publications/factbook/country.html)