| Taipei | | 886 | Yes | |
| Afghanistan | Kabul | Asia | 93 | Yes | Developing |
| Albania | Tirana | Europe | 355 | Yes | Developed |
| Algeria | Algiers | Africa | 213 | Yes | Developing |
| American Samoa | Pago Pago | Oceania | 1-684 | Territory of US | Developing |
| Andorra | Andorra la Vella | Europe | 376 | Yes | Developed |
| Angola | Luanda | Africa | 244 | Yes | Developing |
| Anguilla | The Valley | Americas | 1-264 | Territory of GB | Developing |
| Antarctica | | | 672 | International | |
| Antigua and Barbuda | St. John's | Americas | 1-268 | Yes | Developing |
| Argentina | Buenos Aires | Americas | 54 | Yes | Developing |
| Armenia | Yerevan | Asia | 374 | Yes | Developing |
| Aruba | Oranjestad | Americas | 297 | Part of NL | Developing |
| Australia | Canberra | Oceania | 61 | Yes | Developed |
| Austria | Vienna | Europe | 43 | Yes | Developed |
| Azerbaijan | Baku | Asia | 994 | Yes | Developing |
| Bahamas | Nassau | Americas | 1-242 | Yes | Developing |
| Bahrain | Manama | Asia | 973 | Yes | Developing |
| Bangladesh | Dhaka | Asia | 880 | Yes | Developing |
| Barbados | Bridgetown | Americas | 1-246 | Yes | Developing |
| Belarus | Minsk | Europe | 375 | Yes | Developed |
| Belgium | Brussels | Europe | 32 | Yes | Developed |
| Belize | Belmopan | Americas | 501 | Yes | Developing |
| Benin | Porto-Novo | Africa | 229 | Yes | Developing |
| Bermuda | Hamilton | Americas | 1-441 | Territory of GB | Developed |
| Bhutan | Thimphu | Asia | 975 | Yes | Developing |
| Bolivia (Plurinational State of) | Sucre | Americas | 591 | Yes | Developing |
| Bonaire, Sint Eustatius and Saba | | Americas | 599 | Part of NL | Developing |
| Bosnia and Herzegovina | Sarajevo | Europe | 387 | Yes | Developed |
| Botswana | Gaborone | Africa | 267 | Yes | Developing |
| Bouvet Island | | Americas | 47 | Territory of NO | Developing |
| Brazil | Brasilia | Americas | 55 | Yes | Developing |
| British Indian Ocean Territory | Diego Garcia | Africa | 246 | Territory of GB | Developing |
| British Virgin Islands | Road Town | Americas | 1-284 | Territory of GB | Developing |
| Brunei Darussalam | Bandar Seri Begawan | Asia | 673 | Yes | Developing |
| Bulgaria | Sofia | Europe | 359 | Yes | Developed |
| Burkina Faso | Ouagadougou | Africa | 226 | Yes | Developing |
| Burundi | Bujumbura | Africa | 257 | Yes | Developing |
| Cabo Verde | Praia | Africa | 238 | Yes | Developing |
| Cambodia | Phnom Penh | Asia | 855 | Yes | Developing |
| Cameroon | Yaounde | Africa | 237 | Yes | Developing |
| Canada | Ottawa | Americas | 1 | Yes | Developed |
| Cayman Islands | George Town | Americas | 1-345 | Territory of GB | Developing |
| Central African Republic | Bangui | Africa | 236 | Yes | Developing |
| Chad | N'Djamena | Africa | 235 | Yes | Developing |
| Chile | Santiago | Americas | 56 | Yes | Developing |
| China | Beijing | Asia | 86 | Yes | Developing |
| China, Hong Kong Special Administrative Region | Hong Kong | Asia | 852 | Part of CN | Developing |
| China, Macao Special Administrative Region | Macao | Asia | 853 | Part of CN | Developing |
| Christmas Island | Flying Fish Cove | Oceania | 61 | Territory of AU | Developed |
| Cocos (Keeling) Islands | West Island | Oceania | 61 | Territory of AU | Developed |
| Colombia | Bogota | Americas | 57 | Yes | Developing |
| Comoros | Moroni | Africa | 269 | Yes | Developing |
| Congo | Brazzaville | Africa | 242 | Yes | Developing |
| Cook Islands | Avarua | Oceania | 682 | Associated with NZ | Developing |
| Costa Rica | San Jose | Americas | 506 | Yes | Developing |
| Croatia | Zagreb | Europe | 385 | Yes | Developed |
| Cuba | Havana | Americas | 53 | Yes | Developing |
| Curaçao | Willemstad | Americas | 599 | Part of NL | Developing |
| Cyprus | Nicosia | Asia | 357 | Yes | Developed |
| Czechia | Prague | Europe | 420 | Yes | Developed |
| Côte d'Ivoire | Yamoussoukro | Africa | 225 | Yes | Developing |
| Democratic People's Republic of Korea | Pyongyang | Asia | 850 | Yes | Developing |
| Democratic Republic of the Congo | Kinshasa | Africa | 243 | Yes | Developing |
| Denmark | Copenhagen | Europe | 45 | Yes | Developed |
| Djibouti | Djibouti | Africa | 253 | Yes | Developing |
| Dominica | Roseau | Americas | 1-767 | Yes | Developing |
| Dominican Republic | Santo Domingo | Americas | 1-809,1-829,1-849 | Yes | Developing |
| Ecuador | Quito | Americas | 593 | Yes | Developing |
| Egypt | Cairo | Africa | 20 | Yes | Developing |
| El Salvador | San Salvador | Americas | 503 | Yes | Developing |
| Equatorial Guinea | Malabo | Africa | 240 | Yes | Developing |
| Eritrea | Asmara | Africa | 291 | Yes | Developing |
| Estonia | Tallinn | Europe | 372 | Yes | Developed |
| Eswatini | Mbabane | Africa | 268 | Yes | Developing |
| Ethiopia | Addis Ababa | Africa | 251 | Yes | Developing |
| Falkland Islands (Malvinas) | Stanley | Americas | 500 | Territory of GB | Developing |
| Faroe Islands | Torshavn | Europe | 298 | Part of DK | Developed |
| Fiji | Suva | Oceania | 679 | Yes | Developing |
| Finland | Helsinki | Europe | 358 | Yes | Developed |
| France | Paris | Europe | 33 | Yes | Developed |
| French Guiana | Cayenne | Americas | 594 | Part of FR | Developing |
| French Polynesia | Papeete | Oceania | 689 | Territory of FR | Developing |
| French Southern Territories | Port-aux-Francais | Africa | 262 | Territory of FR | Developing |
| Gabon | Libreville | Africa | 241 | Yes | Developing |
| Gambia | Banjul | Africa | 220 | Yes | Developing |
| Georgia | Tbilisi | Asia | 995 | Yes | Developing |
| Germany | Berlin | Europe | 49 | Yes | Developed |
| Ghana | Accra | Africa | 233 | Yes | Developing |
| Gibraltar | Gibraltar | Europe | 350 | Territory of GB | Developed |
| Greece | Athens | Europe | 30 | Yes | Developed |
| Greenland | Nuuk | Americas | 299 | Part of DK | Developed |
| Grenada | St. George's | Americas | 1-473 | Yes | Developing |
| Guadeloupe | Basse-Terre | Americas | 590 | Part of FR | Developing |
| Guam | Hagatna | Oceania | 1-671 | Territory of US | Developing |
| Guatemala | Guatemala City | Americas | 502 | Yes | Developing |
| Guernsey | St Peter Port | Europe | 44 | Crown dependency of GB | Developed |
| Guinea | Conakry | Africa | 224 | Yes | Developing |
| Guinea-Bissau | Bissau | Africa | 245 | Yes | Developing |
| Guyana | Georgetown | Americas | 592 | Yes | Developing |
| Haiti | Port-au-Prince | Americas | 509 | Yes | Developing |
| Heard Island and McDonald Islands | | Oceania | 672 | Territory of AU | Developed |
| Holy See | Vatican City | Europe | 39-06 | Yes | Developed |
| Honduras | Tegucigalpa | Americas | 504 | Yes | Developing |
| Hungary | Budapest | Europe | 36 | Yes | Developed |
| Iceland | Reykjavik | Europe | 354 | Yes | Developed |
| India | New Delhi | Asia | 91 | Yes | Developing |
| Indonesia | Jakarta | Asia | 62 | Yes | Developing |
| Iran (Islamic Republic of) | Tehran | Asia | 98 | Yes | Developing |
| Iraq | Baghdad | Asia | 964 | Yes | Developing |
| Ireland | Dublin | Europe | 353 | Yes | Developed |
| Isle of Man | Douglas | Europe | 44 | Crown dependency of GB | Developed |
| Israel | Jerusalem | Asia | 972 | Yes | Developed |
| Italy | Rome | Europe | 39 | Yes | Developed |
| Jamaica | Kingston | Americas | 1-876 | Yes | Developing |
| Japan | Tokyo | Asia | 81 | Yes | Developed |
| Jersey | Saint Helier | Europe | 44 | Crown dependency of GB | Developed |
| Jordan | Amman | Asia | 962 | Yes | Developing |
| Kazakhstan | Astana | Asia | 7 | Yes | Developing |
| Kenya | Nairobi | Africa | 254 | Yes | Developing |
| Kiribati | Tarawa | Oceania | 686 | Yes | Developing |
| Kuwait | Kuwait City | Asia | 965 | Yes | Developing |
| Kyrgyzstan | Bishkek | Asia | 996 | Yes | Developing |
| Lao People's Democratic Republic | Vientiane | Asia | 856 | Yes | Developing |
| Latvia | Riga | Europe | 371 | Yes | Developed |
| Lebanon | Beirut | Asia | 961 | Yes | Developing |
| Lesotho | Maseru | Africa | 266 | Yes | Developing |
| Liberia | Monrovia | Africa | 231 | Yes | Developing |
| Libya | Tripoli | Africa | 218 | Yes | Developing |
| Liechtenstein | Vaduz | Europe | 423 | Yes | Developed |
| Lithuania | Vilnius | Europe | 370 | Yes | Developed |
| Luxembourg | Luxembourg | Europe | 352 | Yes | Developed |
| Madagascar | Antananarivo | Africa | 261 | Yes | Developing |
| Malawi | Lilongwe | Africa | 265 | Yes | Developing |
| Malaysia | Kuala Lumpur | Asia | 60 | Yes | Developing |
| Maldives | Male | Asia | 960 | Yes | Developing |
| Mali | Bamako | Africa | 223 | Yes | Developing |
| Malta | Valletta | Europe | 356 | Yes | Developed |
| Marshall Islands | Majuro | Oceania | 692 | Yes | Developing |
| Martinique | Fort-de-France | Americas | 596 | Part of FR | Developing |
| Mauritania | Nouakchott | Africa | 222 | Yes | Developing |
| Mauritius | Port Louis | Africa | 230 | Yes | Developing |
| Mayotte | Mamoudzou | Africa | 262 | Part of FR | Developing |
| Mexico | Mexico City | Americas | 52 | Yes | Developing |
| Micronesia (Federated States of) | Palikir | Oceania | 691 | Yes | Developing |
| Monaco | Monaco | Europe | 377 | Yes | Developed |
| Mongolia | Ulan Bator | Asia | 976 | Yes | Developing |
| Montenegro | Podgorica | Europe | 382 | Yes | Developed |
| Montserrat | Plymouth | Americas | 1-664 | Territory of GB | Developing |
| Morocco | Rabat | Africa | 212 | Yes | Developing |
| Mozambique | Maputo | Africa | 258 | Yes | Developing |
| Myanmar | Nay Pyi Taw | Asia | 95 | Yes | Developing |
| Namibia | Windhoek | Africa | 264 | Yes | Developing |
| Nauru | Yaren | Oceania | 674 | Yes | Developing |
| Nepal | Kathmandu | Asia | 977 | Yes | Developing |
| Netherlands | Amsterdam | Europe | 31 | Yes | Developed |
| New Caledonia | Noumea | Oceania | 687 | Territory of FR | Developing |
| New Zealand | Wellington | Oceania | 64 | Yes | Developed |
| Nicaragua | Managua | Americas | 505 | Yes | Developing |
| Niger | Niamey | Africa | 227 | Yes | Developing |
| Nigeria | Abuja | Africa | 234 | Yes | Developing |
| Niue | Alofi | Oceania | 683 | Associated with NZ | Developing |
| Norfolk Island | Kingston | Oceania | 672 | Territory of AU | Developed |
| Northern Mariana Islands | Saipan | Oceania | 1-670 | Commonwealth of US | Developing |
| Norway | Oslo | Europe | 47 | Yes | Developed |
| Oman | Muscat | Asia | 968 | Yes | Developing |
| Pakistan | Islamabad | Asia | 92 | Yes | Developing |
| Palau | Melekeok | Oceania | 680 | Yes | Developing |
| Panama | Panama City | Americas | 507 | Yes | Developing |
| Papua New Guinea | Port Moresby | Oceania | 675 | Yes | Developing |
| Paraguay | Asuncion | Americas | 595 | Yes | Developing |
| Peru | Lima | Americas | 51 | Yes | Developing |
| Philippines | Manila | Asia | 63 | Yes | Developing |
| Pitcairn | Adamstown | Oceania | 870 | Territory of GB | Developing |
| Poland | Warsaw | Europe | 48 | Yes | Developed |
| Portugal | Lisbon | Europe | 351 | Yes | Developed |
| Puerto Rico | San Juan | Americas | 1 | Commonwealth of US | Developing |
| Qatar | Doha | Asia | 974 | Yes | Developing |
| Republic of Korea | Seoul | Asia | 82 | Yes | Developing |
| Republic of Moldova | Chisinau | Europe | 373 | Yes | Developed |
| Romania | Bucharest | Europe | 40 | Yes | Developed |
| Russian Federation | Moscow | Europe | 7 | Yes | Developed |
| Rwanda | Kigali | Africa | 250 | Yes | Developing |
| Réunion | Saint-Denis | Africa | 262 | Part of FR | Developing |
| Saint Barthélemy | Gustavia | Americas | 590 | Part of FR | Developing |
| Saint Helena | Jamestown | Africa | 290 | Territory of GB | Developing |
| Saint Kitts and Nevis | Basseterre | Americas | 1-869 | Yes | Developing |
| Saint Lucia | Castries | Americas | 1-758 | Yes | Developing |
| Saint Martin (French Part) | Marigot | Americas | 590 | Part of FR | Developing |
| Saint Pierre and Miquelon | Saint-Pierre | Americas | 508 | Part of FR | Developed |
| Saint Vincent and the Grenadines | Kingstown | Americas | 1-784 | Yes | Developing |
| Samoa | Apia | Oceania | 685 | Yes | Developing |
| San Marino | San Marino | Europe | 378 | Yes | Developed |
| Sao Tome and Principe | Sao Tome | Africa | 239 | Yes | Developing |
| Sark | | Europe | | | Developed |
| Saudi Arabia | Riyadh | Asia | 966 | Yes | Developing |
| Senegal | Dakar | Africa | 221 | Yes | Developing |
| Serbia | Belgrade | Europe | 381 | Yes | Developed |
| Seychelles | Victoria | Africa | 248 | Yes | Developing |
| Sierra Leone | Freetown | Africa | 232 | Yes | Developing |
| Singapore | Singapore | Asia | 65 | Yes | Developing |
| Sint Maarten (Dutch part) | Philipsburg | Americas | 1-721 | Part of NL | Developing |
| Slovakia | Bratislava | Europe | 421 | Yes | Developed |
| Slovenia | Ljubljana | Europe | 386 | Yes | Developed |
| Solomon Islands | Honiara | Oceania | 677 | Yes | Developing |
| Somalia | Mogadishu | Africa | 252 | Yes | Developing |
| South Africa | Pretoria | Africa | 27 | Yes | Developing |
| South Georgia and the South Sandwich Islands | Grytviken | Americas | 500 | Territory of GB | Developing |
| South Sudan | Juba | Africa | 211 | Yes | Developing |
| Spain | Madrid | Europe | 34 | Yes | Developed |
| Sri Lanka | Colombo | Asia | 94 | Yes | Developing |
| State of Palestine | East Jerusalem | Asia | 970 | In contention | Developing |
| Sudan | Khartoum | Africa | 249 | Yes | Developing |
| Suriname | Paramaribo | Americas | 597 | Yes | Developing |
| Svalbard and Jan Mayen Islands | Longyearbyen | Europe | 47 | Territory of NO | Developed |
| Sweden | Stockholm | Europe | 46 | Yes | Developed |
| Switzerland | Bern | Europe | 41 | Yes | Developed |
| Syrian Arab Republic | Damascus | Asia | 963 | Yes | Developing |
| Tajikistan | Dushanbe | Asia | 992 | Yes | Developing |
| Thailand | Bangkok | Asia | 66 | Yes | Developing |
| The former Yugoslav Republic of Macedonia | Skopje | Europe | 389 | Yes | Developed |
| Timor-Leste | Dili | Asia | 670 | Yes | Developing |
| Togo | Lome | Africa | 228 | Yes | Developing |
| Tokelau | | Oceania | 690 | Territory of NZ | Developing |
| Tonga | Nuku'alofa | Oceania | 676 | Yes | Developing |
| Trinidad and Tobago | Port of Spain | Americas | 1-868 | Yes | Developing |
| Tunisia | Tunis | Africa | 216 | Yes | Developing |
| Turkey | Ankara | Asia | 90 | Yes | Developing |
| Turkmenistan | Ashgabat | Asia | 993 | Yes | Developing |
| Turks and Caicos Islands | Cockburn Town | Americas | 1-649 | Territory of GB | Developing |
| Tuvalu | Funafuti | Oceania | 688 | Yes | Developing |
| Uganda | Kampala | Africa | 256 | Yes | Developing |
| Ukraine | Kyiv | Europe | 380 | Yes | Developed |
| United Arab Emirates | Abu Dhabi | Asia | 971 | Yes | Developing |
| United Kingdom of Great Britain and Northern Ireland | London | Europe | 44 | Yes | Developed |
| United Republic of Tanzania | Dodoma | Africa | 255 | Yes | Developing |
| United States Minor Outlying Islands | | Oceania | | Territories of US | Developing |
| United States Virgin Islands | Charlotte Amalie | Americas | 1-340 | Territory of US | Developing |
| United States of America | Washington | Americas | 1 | Yes | Developed |
| Uruguay | Montevideo | Americas | 598 | Yes | Developing |
| Uzbekistan | Tashkent | Asia | 998 | Yes | Developing |
| Vanuatu | Port Vila | Oceania | 678 | Yes | Developing |
| Venezuela (Bolivarian Republic of) | Caracas | Americas | 58 | Yes | Developing |
| Viet Nam | Hanoi | Asia | 84 | Yes | Developing |
| Wallis and Futuna Islands | Mata Utu | Oceania | 681 | Territory of FR | Developing |
| Western Sahara | El-Aaiun | Africa | 212 | In contention | Developing |
| Yemen | Sanaa | Asia | 967 | Yes | Developing |
| Zambia | Lusaka | Africa | 260 | Yes | Developing |
| Zimbabwe | Harare | Africa | 263 | Yes | Developing |
| Åland Islands | Mariehamn | Europe | 358 | Part of FI | Developed |