| NAME | CODE | ZIP REQUIRED | STATE COUNT |
| United States | US | YES | 65 |
| Canada | CA | YES | 13 |
| Mexico | MX | YES | 32 |
| Albania | AL | NO | 0 |
| Algeria | DZ | NO | 0 |
| Andorra | AD | NO | 0 |
| Angola | AO | NO | 0 |
| Antigua & Barbuda | AG | NO | 0 |
| Argentina | AR | YES | 0 |
| Armenia | AM | YES | 0 |
| Aruba | AW | NO | 0 |
| Australia | AU | YES | 0 |
| Austria | AT | YES | 0 |
| Azerbaijan | AZ | YES | 0 |
| Azores | AP | NO | 0 |
| Bahamas | BS | NO | 0 |
| Bahrain | BH | NO | 0 |
| Bangladesh | BD | YES | 0 |
| Barbados | BB | NO | 0 |
| Belgium | BE | YES | 0 |
| Belize | BZ | NO | 0 |
| Benin | BJ | NO | 0 |
| Bermuda | BM | NO | 0 |
| Bhutan | BT | NO | 0 |
| Bolivia | BO | NO | 0 |
| Bonaire | BL | NO | 0 |
| Bosnia | BA | YES | 0 |
| Botswana | BW | NO | 0 |
| Brazil | BR | YES | 0 |
| Brunei | BN | NO | 0 |
| Bulgaria | BG | YES | 0 |
| Burkina Faso | BF | NO | 0 |
| Burundi | BI | NO | 0 |
| Cambodia | KH | NO | 0 |
| Cameroon | CM | NO | 0 |
| Canary Islands | IC | NO | 0 |
| Cape Verde | CV | NO | 0 |
| Cayman Islands | KY | NO | 0 |
| Central African Republic | CF | NO | 0 |
| Chad | TD | NO | 0 |
| Chile | CL | NO | 0 |
| China | CN | YES | 0 |
| Colombia | CO | NO | 0 |
| Congo | CG | NO | 0 |
| Cook Islands | CK | NO | 0 |
| Costa Rica | CR | NO | 0 |
| Croatia | HR | YES | 0 |
| Curacao | CB | NO | 0 |
| Cyprus | CY | NO | 0 |
| Czech Republic | CZ | YES | 0 |
| Democratic Republic of Congo | CD | NO | 0 |
| Denmark | DK | YES | 0 |
| Djibouti | DJ | NO | 0 |
| Dominica | DM | NO | 0 |
| Dominican Republic | DO | NO | 0 |
| Ecuador | EC | NO | 0 |
| Egypt | EG | NO | 0 |
| El Salvador | SV | NO | 0 |
| England | EN | NO | 0 |
| Equatorial Guinea | GQ | NO | 0 |
| Eritrea | ER | NO | 0 |
| Estonia | EE | YES | 0 |
| Ethiopia | ET | NO | 0 |
| Faeroe Islands | FO | YES | 0 |
| Fiji | FJ | NO | 0 |
| Finland | FI | YES | 0 |
| France | FR | YES | 0 |
| French Guiana | GF | NO | 0 |
| French Polynesia | PF | NO | 0 |
| Gabon | GA | NO | 0 |
| Gambia | GM | NO | 0 |
| Georgia | GE | YES | 0 |
| Germany | DE | YES | 0 |
| Ghana | GH | NO | 0 |
| Gibraltar | GI | NO | 0 |
| Greece | GR | YES | 0 |
| Greenland | GL | YES | 0 |
| Grenada | GD | NO | 0 |
| Guadeloupe | GP | NO | 0 |
| Guatemala | GT | NO | 0 |
| Guernsey | GG | NO | 0 |
| Guinea | GN | NO | 0 |
| Guinea-Bissau | GW | NO | 0 |
| Guyana | GY | NO | 0 |
| Haiti | HT | NO | 0 |
| Holland | HO | NO | 0 |
| Honduras | HN | NO | 0 |
| Hong Kong | HK | NO | 0 |
| Hungary | HU | YES | 0 |
| Iceland | IS | YES | 0 |
| India | IN | YES | 0 |
| Indonesia | ID | YES | 0 |
| Iraq | IQ | NO | 0 |
| Ireland | IE | NO | 0 |
| Israel | IL | YES | 0 |
| Italy | IT | YES | 0 |
| Ivory Coast | CI | NO | 0 |
| Jamaica | JM | NO | 0 |
| Japan | JP | YES | 0 |
| Jersey | JE | NO | 0 |
| Jordan | JO | NO | 0 |
| Kazakhstan | KZ | YES | 0 |
| Kenya | KE | NO | 0 |
| Kiribati | KI | NO | 0 |
| Kosrae | KO | NO | 0 |
| Kuwait | KW | NO | 0 |
| Kyrgyzstan | KG | YES | 0 |
| Laos | LA | NO | 0 |
| Latvia | LV | YES | 0 |
| Lebanon | LB | NO | 0 |
| Lesotho | LS | NO | 0 |
| Liberia | LR | NO | 0 |
| Liechtenstein | LI | YES | 0 |
| Lithuania | LT | YES | 0 |
| Luxembourg | LU | YES | 0 |
| Macau | MO | NO | 0 |
| Macedonia | MK | YES | 0 |
| Madagascar | MG | NO | 0 |
| Madeira | ME | NO | 0 |
| Malawi | MW | NO | 0 |
| Malaysia | MY | YES | 0 |
| Maldives | MV | NO | 0 |
| Mali | ML | NO | 0 |
| Malta | MT | NO | 0 |
| Martinique | MQ | YES | 0 |
| Mauritania | MR | NO | 0 |
| Mauritius | MU | NO | 0 |
| Moldova | MD | YES | 0 |
| Monaco | MC | YES | 0 |
| Mongolia | MN | YES | 0 |
| Montserrat | MS | NO | 0 |
| Morocco | MA | NO | 0 |
| Mozambique | MZ | NO | 0 |
| Namibia | NA | NO | 0 |
| Nepal | NP | YES | 0 |
| Netherlands | NL | YES | 0 |
| Netherlands Antilles | AN | NO | 0 |
| New Caledonia | NC | NO | 0 |
| New Zealand | NZ | YES | 0 |
| Nicaragua | NI | NO | 0 |
| Niger | NE | NO | 0 |
| Nigeria | NG | NO | 0 |
| Norfolk Island | NF | NO | 0 |
| Northern Ireland | NB | NO | 0 |
| Norway | NO | NO | 0 |
| Oman | OM | NO | 0 |
| Pakistan | PK | YES | 0 |
| Panama | PA | NO | 0 |
| Papua New Guinea | PG | NO | 0 |
| Paraguay | PY | NO | 0 |
| Peru | PE | NO | 0 |
| Philippines | PH | YES | 0 |
| Poland | PL | YES | 0 |
| Ponape | PO | NO | 0 |
| Portugal | PT | YES | 0 |
| Qatar | QA | NO | 0 |
| Reunion | RE | YES | 0 |
| Romania | RO | YES | 0 |
| Rota | RT | NO | 0 |
| Russia | RU | YES | 0 |
| Rwanda | RW | NO | 0 |
| Saba | SS | NO | 0 |
| Saipan | SP | NO | 0 |
| San Marino | SM | YES | 0 |
| Saudi Arabia | SA | YES | 0 |
| Scotland | SF | NO | 0 |
| Senegal | SN | NO | 0 |
| Serbia and Montenegro | CS | YES | 0 |
| Seychelles | SC | NO | 0 |
| Sierra Leone | SL | NO | 0 |
| Singapore | SG | YES | 0 |
| Slovakia | SK | YES | 0 |
| Slovenia | SI | YES | 0 |
| Solomon Islands | SB | NO | 0 |
| South Africa | ZA | YES | 0 |
| South Korea | KR | YES | 0 |
| Spain | ES | YES | 0 |
| Sri Lanka | LK | YES | 0 |
| St. Barthelemy | NT | NO | 0 |
| St. Christopher | SW | NO | 0 |
| St. Eustatius | EU | NO | 0 |
| St. Kitts & Nevis | KN | NO | 0 |
| St. Lucia | LC | NO | 0 |
| St. Maarten | MB | NO | 0 |
| St. Martin | TB | NO | 0 |
| St. Vincent & Grenadines | VC | NO | 0 |
| Suriname | SR | NO | 0 |
| Swaziland | SZ | NO | 0 |
| Sweden | SE | YES | 0 |
| Switzerland | CH | NO | 0 |
| Syria | SY | NO | 0 |
| Tahiti | TA | NO | 0 |
| Taiwan | TW | YES | 0 |
| Tajikistan | TJ | YES | 0 |
| Tanzania | TZ | NO | 0 |
| Thailand | TH | YES | 0 |
| Timor Leste | TL | NO | 0 |
| Tinian | TI | NO | 0 |
| Togo | TG | NO | 0 |
| Tonga | TO | NO | 0 |
| Trinidad & Tobago | TT | NO | 0 |
| Truk | TU | NO | 0 |
| Tunisia | TN | NO | 0 |
| Turkey | TR | YES | 0 |
| Turkmenistan | TM | YES | 0 |
| Turks & Caicos Islands | TC | NO | 0 |
| Tuvalu | TV | NO | 0 |
| Uganda | UG | NO | 0 |
| Ukraine | UA | YES | 0 |
| Union Island | UI | NO | 0 |
| United Arab Emirates | AE | NO | 0 |
| United Kingdom | GB | YES | 0 |
| Uruguay | UY | YES | 0 |
| Uzbekistan | UZ | YES | 0 |
| Vanuatu | VU | NO | 0 |
| Vatican City State | VA | NO | 0 |
| Venezuela | VE | NO | 0 |
| Vietnam | VN | YES | 0 |
| Wales | WL | NO | 0 |
| Wallis & Futuna Islands | WF | NO | 0 |
| Western Samoa | WS | NO | 0 |
| Yap | YA | NO | 0 |
| Yemen | YE | NO | 0 |
| Yugoslavia | CS | NO | 0 |
| Zambia | ZM | NO | 0 |
| Zimbabwe | ZW | NO | 0 |
| Iran | IR | NO | 0 |
| Belarus | BY | YES | 0 |