11/08/2024 update: A code “US” was added for “United States of America” because that code can now be reported in some instances on the forms that request entry of a two-character country code. Those forms are Form 926, Form 1118, Form 3520, and Form 8805.
| Country name | Country code | 
|---|---|
| Afghanistan | AF | 
| Akrotiri | AX | 
| Albania | AL | 
| Algeria | AG | 
| American Samoa | AQ | 
| Andorra | AN | 
| Angola | AO | 
| Anguilla | AV | 
| Antarctica | AY | 
| Antigua & Barbuda | AC | 
| Argentina | AR | 
| Armenia | AM | 
| Aruba | AA | 
| Ashmore and Cartier Islands | AT | 
| Australia | AS | 
| Austria | AU | 
| Azerbaijan | AJ | 
| Bahamas | BF | 
| Bahrain | BA | 
| Baker Island | FQ | 
| Bangladesh | BG | 
| Barbados | BB | 
| Belarus | BO | 
| Belgium | BE | 
| Belize | BH | 
| Benin | BN | 
| Bermuda | BD | 
| Bhutan | BT | 
| Bolivia | BL | 
| Bosnia-Herzegovina | BK | 
| Botswana | BC | 
| Bouvet Island | BV | 
| Brazil | BR | 
| British Indian Ocean Territory | IO | 
| British Virgin Islands | VI | 
| Brunei | BX | 
| Bulgaria | BU | 
| Burkina Faso | UV | 
| Burma | BM | 
| Burundi | BY | 
| Cambodia | CB | 
| Cameroon | CM | 
| Canada | CA | 
| Cape Verde | CV | 
| Cayman Islands | CJ | 
| Central African Republic | CT | 
| Chad | CD | 
| Chile | CI | 
| China | CH | 
| Christmas Island | KT | 
| Clipperton Island | IP | 
| Cocos (Keeling) Islands | CK | 
| Colombia | CO | 
| Comoros | CN | 
| Congo (Brazzaville) | CF | 
| Congo (Kinshasa) | CG | 
| Cook Islands | CW | 
| Coral Sea Islands | CR | 
| Costa Rica | CS | 
| Cote D'Ivoire (Ivory Coast) | IV | 
| Croatia | HR | 
| Cuba | CU | 
| Curacao | UC | 
| Cyprus | CY | 
| Czech Republic | EZ | 
| Denmark | DA | 
| Dhekelia | DX | 
| Djibouti | DJ | 
| Dominica | DO | 
| Dominican Republic | DR | 
| East Timor | TT | 
| Ecuador | EC | 
| Egypt | EG | 
| El Salvador | ES | 
| Equatorial Guinea | EK | 
| Eritrea | ER | 
| Estonia | EN | 
| Ethiopia | ET | 
| Falkland Islands (Islas Malvinas) | FK | 
| Faroe Islands | FO | 
| Federated States of Micronesia | FM | 
| Fiji | FJ | 
| Finland | FI | 
| France | FR | 
| French Polynesia | FP | 
| French Southern and Antarctic Lands | FS | 
| Gabon | GB | 
| The Gambia | GA | 
| Georgia | GG | 
| Germany | GM | 
| Ghana | GH | 
| Gibraltar | GI | 
| Greece | GR | 
| Greenland | GL | 
| Grenada | GJ | 
| Guam | GQ | 
| Guatemala | GT | 
| Guernsey | GK | 
| Guinea | GV | 
| Guinea-Bissau | PU | 
| Guyana | GY | 
| Haiti | HA | 
| Heard Island and McDonald Islands | HM | 
| Holy See | VT | 
| Honduras | HO | 
| Hong Kong | HK | 
| Howland Island | HQ | 
| Hungary | HU | 
| Iceland | IC | 
| India | IN | 
| Indonesia | ID | 
| Iran | IR | 
| Iraq | IZ | 
| Ireland | EI | 
| Israel | IS | 
| Italy | IT | 
| Jamaica | JM | 
| Jan Mayen | JN | 
| Japan | JA | 
| Jarvis Island | DQ | 
| Jersey | JE | 
| Johnston Atoll | JQ | 
| Jordan | JO | 
| Kazakhstan | KZ | 
| Kenya | KE | 
| Kingman Reef | KQ | 
| Kiribati | KR | 
| Korea, Democratic People's Republic of (North) | KN | 
| Korea, Republic of (South) | KS | 
| Kosovo | KV | 
| Kuwait | KU | 
| Kyrgyzstan | KG | 
| Laos | LA | 
| Latvia | LG | 
| Lebanon | LE | 
| Lesotho | LT | 
| Liberia | LI | 
| Libya | LY | 
| Liechtenstein | LS | 
| Lithuania | LH | 
| Luxembourg | LU | 
| Macau | MC | 
| Macedonia | MK | 
| Madagascar | MA | 
| Malawi | MI | 
| Malaysia | MY | 
| Maldives | MV | 
| Mali | ML | 
| Malta | MT | 
| Man, Isle of | IM | 
| Marshall Islands | RM | 
| Mauritania | MR | 
| Mauritius | MP | 
| Mexico | MX | 
| Midway Islands | MQ | 
| Moldova | MD | 
| Monaco | MN | 
| Mongolia | MG | 
| Montenegro | MJ | 
| Montserrat | MH | 
| Morocco | MO | 
| Mozambique | MZ | 
| Namibia | WA | 
| Nauru | NR | 
| Navassa Island | BQ | 
| Nepal | NP | 
| Netherlands | NL | 
| New Caledonia | NC | 
| New Zealand | NZ | 
| Nicaragua | NU | 
| Niger | NG | 
| Nigeria | NI | 
| Niue | NE | 
| Norfolk Island | NF | 
| Northern Mariana Islands | CQ | 
| Norway | NO | 
| Oman | MU | 
| Other Country | OC | 
| Pakistan | PK | 
| Palau | PS | 
| Palmyra Atoll | LQ | 
| Panama | PM | 
| Papua-New Guinea | PP | 
| Paracel Islands | PF | 
| Paraguay | PA | 
| Peru | PE | 
| Philippines | RP | 
| Pitcairn Islands | PC | 
| Poland | PL | 
| Portugal | PO | 
| Puerto Rico | RQ | 
| Qatar | QA | 
| Romania | RO | 
| Russia | RS | 
| Rwanda | RW | 
| Saint Barthelemy | TB | 
| Saint Martin | RN | 
| Samoa | WS | 
| San Marino | SM | 
| Sao Tome and Principe | TP | 
| Saudi Arabia | SA | 
| Senegal | SG | 
| Serbia | RI | 
| Seychelles | SE | 
| Sierra Leone | SL | 
| Singapore | SN | 
| Sint Maarten | NN | 
| Slovakia | LO | 
| Slovenia | SI | 
| Solomon Islands | BP | 
| Somalia | SO | 
| South Africa | SF | 
| South Georgia and the South Sandwich Islands | SX | 
| South Sudan | OD | 
| Spain | SP | 
| Spratly Islands | PG | 
| Sri Lanka | CE | 
| St. Helena | SH | 
| St. Kitts and Nevis | SC | 
| St. Lucia Island | ST | 
| St. Pierre and Miquelon | SB | 
| St. Vincent and the Grenadines | VC | 
| Sudan | SU | 
| Suriname | NS | 
| Svalbard | SV | 
| Swaziland | WZ | 
| Sweden | SW | 
| Switzerland | SZ | 
| Syria | SY | 
| Taiwan | TW | 
| Tajikistan | TI | 
| Tanzania | TZ | 
| Thailand | TH | 
| Togo | TO | 
| Tokelau | TL | 
| Tonga | TN | 
| Trinidad and Tobago | TD | 
| Tunisia | TS | 
| Turkey | TU | 
| Turkmenistan | TX | 
| Turks and Caicos Islands | TK | 
| Tuvalu | TV | 
| Uganda | UG | 
| Ukraine | UP | 
| United Arab Emirates | AE | 
| United Kingdom (England, Northern Ireland, Scotland, and Wales) | UK | 
| United States of America | US | 
| Uruguay | UY | 
| Uzbekistan | UZ | 
| Vanuatu | NH | 
| Venezuela | VE | 
| Vietnam | VM | 
| Virgin Islands | VQ | 
| Wake Island | WQ | 
| Wallis and Futuna | WF | 
| Western Sahara | WI | 
| Yemen (Aden) | YM | 
| Zambia | ZA | 
| Zimbabwe | ZI |