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