| Afghanistan | AF |
| Albania | AL |
| Algeria | DZ |
| American Samoa | AS |
| Andorra | AD |
| Angola | AO |
| Anguilla | AI |
| Antarctica | AQ |
| Antigua and Barbuda | AG |
| Argentina | AR |
| Armenia | AM |
| Aruba | AW |
| Australia | AU |
| Azerbaidjan | AZ |
| The Bahamas | BS |
| Bahrain | BH |
| Bangladesh | BD |
| Barbados | BB |
| Burma | MM |
| Belgium | BE |
| Belize | BZ |
| Belarus | BY |
| Benin | BJ |
| Bermuda | BM |
| Kingdom of Bhutan | BT |
| Bolivia | BO |
| Bosnia and Herzegovina | BA |
| Botswana | BW |
| Bouvet Island | BV |
| Brazil | BR |
| British Indian Ocean Territory | IO |
| British Virgin Islands | VG |
| Brunei Darussalam | BN |
| Bulgaria | BG |
| Burkina Faso | BF |
| Burundi | BI |
| Canton and Enderbury | CT |
| Cook Islands | CK |
| Chad | TD |
| Czech Republic | CZ |
| Czechoslovakia | CS |
| People's Republic of China | CN |
| Denmark | DK |
| Dominica | DM |
| Dominican Republic | DO |
| Djibouti | DJ |
| Egypt | EG |
| Ecuador | EC |
| Eritrea | ER |
| Estonia | EE |
| Ethiopia | ET |
| Faroe Islands | FO |
| Falkland Islands | FK |
| Federated States of Micronesia | FM |
| Fiji | FJ |
| Philippines | PH |
| Finland | FI |
| France | FR |
| French Guiana | GF |
| French Southern Lands | TF |
| French Polynesia | PF |
| Gabon | GA |
| The Gambia | GM |
| Ghana | GH |
| Gibraltar | GI |
| Grenada | GD |
| Greenland | GL |
| Georgia | GE |
| Guadeloupe | GP |
| Guam | GU |
| Guatemala | GT |
| Guinea | GN |
| Guinea-Bissau | GW |
| Guyana | GY |
| Haiti | HT |
| Heard Island and MacDonald Islands | HM |
| Honduras | HN |
| Hong Kong | HK |
| Chile | CL |
| Croatia | HR |
| India | IN |
| Indonesia | ID |
| Iraq | IQ |
| Iran | IR |
| Ireland | IE |
| Iceland | IS |
| Italy | IT |
| Israel | IL |
| Jamaica | JM |
| Japan | JP |
| Yemen | YE |
| South Africa | ZA |
| South Georgia and the South Sandwich Islands | GS |
| South Yemen | YD |
| South Korea | KR |
| Johnston Atoll | JT |
| Jordan | JO |
| Yugoslavia | YU |
| Cayman Islands | KY |
| Cambodia | KH |
| Cameroon | CM |
| Canada | CA |
| Cape Verde | CV |
| Qatar | QA |
| Kazakhstan | KZ |
| Kenya | KE |
| Kiribati | KI |
| North Korea | KP |
| Cocos Islands | CC |
| Columbia | CO |
| Comoros | KM |
| Republic of Congo | CG |
| Costa Rica | CR |
| Cuba | CU |
| Kuwait | KW |
| Cyprus | CY |
| Kyrgyzstan | KG |
| Laos | LA |
| Lesotho | LS |
| Lebanon | LB |
| Liberia | LR |
| Libya | LY |
| Liechtenstein | LI |
| Lithuania | LT |
| Latvia | LV |
| Luxembourg | LU |
| Macau | MO |
| Madagascar | MG |
| Hungary | HU |
| Macedonia | MK |
| Malaysia | MY |
| Malawi | MW |
| Maldives | MV |
| Mali | ML |
| Malta | MT |
| Morocco | MA |
| Marshall Islands | MH |
| Martinique | MQ |
| Mauritius | MU |
| Mauritania | MR |
| Mayotte | YT |
| Mexico | MX |
| Midway Islands | MI |
| Micronesia | PC |
| Moldova | MD |
| Monaco | MC |
| Mongolia | MN |
| Montserrat | MS |
| Mozambique | MZ |
| Union of Myanmar | MM |
| Namibia | NA |
| Nauru | NR |
| German Democratic Republic (until 1990) - GDR | DD |
| Germany (since 1991) | DE |
| Nepal | NP |
| Neutral Territory | NT |
| Niger | NE |
| Nigeria | NG |
| Nicaragua | NI |
| Niue | NU |
| Netherlands | NL |
| Netherlands Antilles | AN |
| Norfolk | NF |
| Norway | NO |
| New Caledonia | NC |
| New Zealand | NZ |
| Oman | OM |
| US Islands in the Pacific Ocean | UM |
| Pakistan | PK |
| Palau | PW |
| Palestine | PS |
| Panama | PA |
| Panama Canal Zone | PZ |
| Virgin Islands (USA) | VI |
| Papua New Guinea | PG |
| Paraguay | PY |
| Peru | PE |
| Pitcairn Islands | PN |
| Cote d'Ivoire | CI |
| Poland | PL |
| Puerto Rico | PR |
| Portugal | PT |
| Austria | AT |
| Reunion | RE |
| Equatorial Guinea | GQ |
| Romania | RO |
| Russia | RU |
| Rwanda | RW |
| Greece | GR |
| Saint Pierre and Miquelon | PM |
| Salvador | SV |
| Samoa | WS |
| San Marino | SM |
| Saudi Arabia | SA |
| Senegal | SN |
| Northern Mariana Islands | MP |
| Seychelles | SC |
| Sierra Leone | SL |
| Singapore | SG |
| Slovakia | SK |
| Slovenia | SI |
| Somalia | SO |
| United Arab Emirates | AE |
| Sri Lanka | LK |
| Federal Republic of Germany (until 1990) - FRG | DB |
| Union of the Soviet Socialist Republics - USSR | SU |
| Central African Republic | CF |
| Sudan | SD |
| Surinam | SR |
| Saint Helena | SH |
| St. Christophe | KN |
| Saint Lucia | LC |
| Sao Tomé | ST |
| Saint Vincent and the Grenadines | VC |
| Swaziland | SZ |
| Syria | SY |
| Solomon Islands | SB |
| Spain | ES |
| Svalbard | SJ |
| Sweden | SE |
| Switzerland | CH |
| Tajikistan | TJ |
| Tanzania | TZ |
| Thailand | TH |
| Taiwan | TW |
| Togo | TG |
| Tokelau | TK |
| Tonga | TO |
| Trinidad and Tobago | TT |
| Tunisia | TN |
| Turkey | TR |
| Turkmenistan | TU |
| Turks and Caicos Islands | TC |
| Tuvalu | TV |
| Uganda | UG |
| Ukraine | UA |
| Uruguay | UY |
| U.S.A. | US |
| Uzbekistan | UZ |
| Christmas Island | CX |
| Vanuatu | VU |
| Vatican | VA |
| Great Britain | GB |
| Venezuela | VE |
| Vietnam | VN |
| East Timor | TP |
| Wake Island | WK |
| Wallis Islands | WF |
| Zaire | ZR |
| Zambia | ZM |
| West Berlin (until 1991) | WB |
| Western Sahara | EH |
| Queen Maud Land | NQ |
| Zimbabwe | ZW |
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