Here is the list of CompTIA voucher types depending on which region you are from.
USD: The United States, Canada, American Samoa, Guam, Northern Mariana Islands, and the U.S. Minor Outlying Islands.
USDg: Afghanistan, Andorra, Anguilla, Antarctica, Armenia, Ascension and Tristan da Cunha Saint Helena , Azerbaijan, Bahrain, Benin, Bonaire, Bosnia And Herzegovina, Bouvet Island, Brazil, British Indian Ocean Territory, Brunei Darussalam, Bulgaria, Burkina Faso, Cape Verde, Central African Republic, China, Christmas Island, Cocos (Keeling) Islands, Comoros, Cook Islands, Cote D'ivoire (Ivory Coast), Croatia, Denmark, East Timor, Ecuador, Equatorial Guinea, Falkland Islands, Faroe Islands, French Polynesia, French Southern Territories, Gambia, Georgia, Greenland, Guinea, Guinea-Bissau, Heard Island and McDonald Island, Holy See (Vatican City), Hong Kong, Hungary, Iraq, Israel, Ivory Coast, Jordan, Kazakhstan, Kiribati, South Korea, Kuwait, Kyrgyzstan, Lao People's Democratic Republic, Lao People's Democratic Republic, Liberia, Liechtenstein, Macau, Malaysia, Marshall Islands, Mayotte, Micronesia, Moldova, Monaco, Mongolia, Montserrat, Myanmar, Myanmar, Nauru, New Zealand, Niger, Niue, Norfolk Island, Oman, Palau, Palestinian Territory, Occupied, Papua New Guinea, Pitcairn, Qatar, Republic of Korea, Republic of the Congo, Romania, Samoa, San Marino, Sao Tome and Principe, Saudi Arabia, Serbia, Singapore, Sint Maarten, Solomon Islands , South Georgia and South Sandwich Islands, South Sudan, St. Barthélemy, St. Helena, St. Pierre & Micquelon, Svalbard and Jan Mayan, Sweden, Switzerland, Taiwan, Tajikistan, Tokelau, Tonga, Turkmenistan, Tuvalu, United Arab Emirates, Vatican City State, Wallis and Futuna.
USDE: Albania, Algeria, Angola, Antigua and Barbuda, Argentina, Aruba, Bahamas, Bangladesh, Barbados, Belize, Bermuda, Bhutan, Bolivia, Botswana, Brazil, British Virigin Islands, Burundi, Cambodia, Cameroon, Cayman Islands, Chad, Chile, Democratic Republic of Congo, Colombia, Costa Rica, Curaçao, Djibouti, Dominica, Dominican Republic, Egypt, El Salvador, Eritrea, Ethiopia, French Guiana, Gabon, Ghana, Grenada, Guadeloupe, Guatemala, Guyana, Haiti, Honduras, India, Indonesia, Jamaica, Kenya, Kosovo, Laos, Lebanon, Lesotho, Libya, Macedonia, Madagascar, Malawi, Maldives, Mali, Martinique, Mauritania, Mauritius, Mexico, Montenegro, Morocco, Mozambique, Namibia, Nepal, Nicaragua, Nigeria, Pakistan, Panama, Paraguay, Peru, Philippines, Puerto Rico, Rwanda, St. Kitts and Nevis, St. Lucia, Senegal, Seychelles, Sierra Leone, St. Martin, Somalia, Sri Lanka, Swaziland, St. Vincent & Grenadines, Suriname, Tanzania, Thailand, Togo, Trinidad And Tobago, Tunisia, Turkey, Turks and Caicos Islands, Uganda, Ukraine, Uruguay, Uzbekistan, U.S. Virgin Islands, Venezuela, Vietnam, Western Sahara, Yemen, Zambia, and Zimbabwe.
EUR-Aland Islands, Austria, Belgium, Cyprus, Czech Republic, Estonia, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Reunion (France), Slovakia, Slovenia, and Spain.
GBP: Gibraltar, Guernsey, Isle of Man, Jersey, and the United Kingdom.
AUD: Australia, Fiji, New Caledonia, and Vanuatu.
Japan: Japan
South Africa: South Africa