My worked countries.
Updated 28.02.2021
1A0 Sov. Mil. Order of Malta 3A Monaco 3B8 Mauritius 3B9 Rodriguez Island 3C Equatorial Guinea 3C0 Annobon 3D2 Fiji 3D2C Conway Reef 3D6 Swaziland 3V Tunisia 3W Vietnam 3X Republic of Guinea 4J Azerbaijan 4L Georgia 4O Montenegro 4S Sri Lanka 4U1/i United Nations Geneva 4W East-Timor 4X Israel 5A Libya 5B Cyprus 5H Tanzania 5N Nigeria 5R Madagascar 5T Mauritania 5U Niger 5V Togo 5W Western Samoa 5X Uganda 5Z Kenya 6W Senegal 6Y Jamaica 7O Yemen 7P Lesotho 7Q Malawi 7X Algeria 8P Barbados 8Q Maldive Islands 8R Guyana 9A Croatia 9G Ghana 9H Malta 9J Zambia 9K Kuwait 9L Sierra Leone 9M2 West Malaysia 9M6 East Malaysia 9N Nepal 9Q Dem. Rep. of Congo 9V Singapore 9X Rwanda 9Y Trinidad&Tobago A2 Botswana A3 Tonga A4 Oman A5 Bhutan A6 United Arab Emirates A7 Qatar A9 Bahrain AP Pakistan BV Taiwan BY China C3 Andorra C5 The Gambia C6 Bahamas C9 Mozambique CE Chile CN Morocco CO Cuba CP Bolivia CT Portugal CT8 Azores CT9 Madeira CX Uruguay D2 Angola D4 Cape Verde D6 Comoros DL Germany DU Philippines E3 Eritrea E4 Palestine E5/S South Cook Islands E6 Niue E7 Bosnia and Herzegovina EA Spain EA6 Balearic Islands EA8 Canary Islands EA9 Ceuta and Melilla EI Ireland EK Armenia EL Liberia EP Iran ER Moldavia ES Estonia ET Ethiopia EU Belarus EX Kyrgyzstan EY Tadzhikistan F France FG Guadeloupe FJ Saint Barthelemy FK New Caledonia FM Martinique FO French Polynesia FO/A Austral Island FO/M Marquesas FR Reunion FS Sint Martin FT5Z Amsterdam Is FW Wallis & Futuna FY French Guiana G England GD Isle of Man GI Northern Ireland GJ Jersey GM Scotland GU Guernsey GW Wales H40 Temotu HA Hungary HB0 Liechtenstein HB9 Switzerland HC Ecuador HI Dominican Republic HK Colombia HK0 San Andres HL Korea HP Panama HR Honduras HS Thailand HV Vatican City HZ Saudi Arabia I Italy IS Sardinia J2 Djibouti J3 Grenada J5 Guinea-Bissau J6 Saint Lucia J7 Dominica J8 Saint Vincent JA Japan JD1 Minami Torishima JD1O Ogasawara JT Mongolia JW Svalbard JX Jan Mayen JY Jordan KC4 Antarctica KH0 Mariana Islands KH2 Guam KH6 Hawaii KL7 Alaska KP1 Navassa Island KP2 Virgin Islands KP4 Puerto Rico LA Norway LU Argentina LX Luxembourg LY Lithuania LZ Bulgaria OA Peru OD Lebanon OE Austria OH Finland OH0 Aland Island OJ0 Market Reef OK Czechia OM Slovakia ON Belgium OX Greenland OY Faroe Islands OZ Denmark P2 Papua New Guinea P4 Aruba PA Netherlands PJ2 Curaçao PJ4 Bonaire PJ5 Saba & St. Eustatius PJ7 Sint Maarten PY Brazil PY0F Fernando de Noronha PZ Suriname R1FJ Franz Josef Land S0 Western Sahara S2 Bangladesh S5 Slovenia S7 Seychelles S9 Sao Tome SM Sweden SP Poland ST Sudan SU Egypt SV Greece SV5 Dodecanese SV9 Crete T2 Tuvalu T32 East Kiribati T5 Somalia T7 San Marino T8 Palau TA Turkey TF Iceland TI Costa Rica TJ Cameroon TK Corsica TL Central African Rep TN Congo TR Gabon TT Chad TU Ivory Coast TY Benin TZ Mali UA Russia UA2 Kaliningrad UA9 Asiatic Russia UK Uzbekistan UN Kazakhstan UR Ukraine V2 Antigua V3 Belize V4 Saint Kitts & Nevis V5 Namibia V6 Micronesia V7 Marshall Islands V8 Brunei VE Canada VK Australia VK9M Mellish Reef VK9X Christmas Island VK9Y Cocos Keeling VP2E Anguilla VP2M Montserrat VP2V British Virgin Islands VP5 Turks & Caicos Islands VP8 Falkland Islands VP8/O South Orkney VP8/S South Shetland VP9 Bermuda VQ9 Chagos VR Hong Kong VU India VU4 Andaman & Nicobar Isl VU7 Laccadive Islands W United States XE Mexico XT Burkina Faso XU Kampuchea XW Laos XX9 Macao XZ Myanmar (Burma) YA Afghanistan YB Indonesia YI Iraq YL Latvia YN Nicaragua YO Romania YS El Salvador YU Serbia YV Venezuela Z2 Zimbabwe Z3 Macedonia-Skopje Z6 Republic of Kosovo Z8 South Sudan ZA Albania ZB Gibraltar ZC Cyprus (British bases) ZD7 Saint Helena ZD8 Ascension Island ZD9 Tristan de Cunha ZF Cayman Islands ZL New Zealand ZL7 Chatham Island ZP Paraguay ZS South Africa ZS8 Prince Edward&Marion Is