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