UK postcodes and the postal zones are set out in the table below, if the postcode is not shown then the postal zone will be set as per the lower table.
|
| CountryZone | CountryZone |
| Afghanistan18 | Liechtenstein5 |
| Albania5 | Lithuania5 |
| Algeria19 | Luxembourg5 |
| Andorra6 | Macao18 |
| Angola18 | Macedonia18 |
| Anguilla18 | Madagascar18 |
| Antigua & Barbuda18 | Madeira5 |
| Argentina18 | Malasia18 |
| Armenia18 | Malawi18 |
| Aruba18 | Malaysia17 |
| Ascension Island18 | Maldives18 |
| Australia17 | Mali18 |
| Austria5 | Malta5 |
| Azerbaijan18 | Marshall Islands18 |
| Azores18 | Martinique18 |
| Bahamas18 | Mauritania18 |
| Bahrain18 | Mauritius18 |
| Balearic Islands18 | Mexico18 |
| Bangladesh18 | Micronesia18 |
| Barbados18 | Moldova18 |
| Belarus13 | Monaco5 |
| Belgium5 | Mongolia18 |
| Belize18 | Montserrat18 |
| Benin18 | Morocco18 |
| Bermuda18 | Mozambique18 |
| Bhutan18 | Myanmar18 |
| Bolivia18 | Namibia18 |
| Bosnia-Herzegovina18 | Nauru18 |
| Botswana18 | Nepal18 |
| Brazil18 | Netherlands5 |
| Brunei Darussalam18 | Netherlands Antilles18 |
| Bulgaria5 | New Caledonia18 |
| Burkina Faso18 | New Zealand18 |
| Burundi18 | New Zealand Island Territories18 |
| Cambodia18 | Nicaragua18 |
| Cameroon18 | Niger18 |
| Canada18 | Nigeria18 |
| Canary Isles5 | Norfolk Island18 |
| Cape Verde18 | Northern Ireland1 |
| Cayman Islands18 | Northern Mariana Islands18 |
| Central African Republic18 | Norway5 |
| Chad18 | Oman18 |
| Channel Islands1 | Pakistan18 |
| Chile18 | Panama18 |
| China (Peoples Republic of)18 | Papua New Guinea18 |
| Christmas Island18 | Paraguay18 |
| Cocos (Keeling) Islands18 | Peru18 |
| Columbia18 | Phillippines18 |
| Comoros18 | Pitcairn Islands5 |
| Congo18 | Poland5 |
| Corsica18 | Portugal5 |
| Costa Rica18 | Puerto Rico16 |
| Croatia18 | Qatar18 |
| Cuba18 | Rest of World18 |
| Cyprus5 | Reunion18 |
| Czech Republic5 | Romania5 |
| Denmark5 | Russia18 |
| Djibouti18 | Rwanda18 |
| Dominica18 | Samoa18 |
| Dominican Republic18 | San Marino18 |
| East Timor18 | Sao Tome & Principe18 |
| Ecuador18 | Sardinia18 |
| Egypt18 | Saudi Arabia18 |
| El Salvador18 | Scilly Isles18 |
| England0 | Scotland (Mainland)0 |
| Equatorial Guinea18 | Scottish Isles1 |
| Eritrea18 | Senegal18 |
| Estonia5 | Serbia18 |
| Ethiopia18 | Serbia & Montenegro18 |
| Falkland Islands18 | Seychelles18 |
| Far East18 | Sicily18 |
| Faroe Isles18 | Sierra Leone18 |
| Fiji18 | Singapore18 |
| Finland5 | Slovakia5 |
| France5 | Slovenia5 |
| French Guiana18 | Solomon Islands18 |
| French Polynesia18 | Somalia18 |
| Gabon18 | South Africa18 |
| Gambia18 | Spain5 |
| Gaza & Khan Yunis18 | Spanish Territories of North Africa18 |
| Georgia18 | Spitzbergen18 |
| Germany5 | Sri Lanka18 |
| Ghana18 | St Christopher & Nevis18 |
| Gibraltar5 | St Helena18 |
| Greece5 | St Lucia18 |
| Greenland5 | St Pierre & Miquelon18 |
| Grenada18 | St Vincent & Grenadines18 |
| Guadaloupe18 | Sudan18 |
| Guam18 | Swaziland18 |
| Guatemala18 | Sweden5 |
| Guayana18 | Switzerland5 |
| Guernsey1 | Syria18 |
| Guinea18 | Taiwan18 |
| Guinea-Bissau18 | Tajikistan18 |
| Haiti18 | Tanzania18 |
| Honduras18 | Tasmania18 |
| Hong Kong18 | Thailand18 |
| Hungary5 | Togo18 |
| Iceland5 | Tonga18 |
| India18 | Trinidad & Tobago18 |
| Indonesia18 | Tristran da Cunha18 |
| Iran18 | Tunisia5 |
| Iraq18 | Turkey5 |
| Irish Republic5 | Turkmenistan18 |
| Isle of Man1 | Turks & Caicos Islands18 |
| Israel18 | Tuvalu18 |
| Italy5 | Uganda18 |
| Ivory Coast18 | Ukraine18 |
| Jamaica18 | United Arab Emirates18 |
| Japan18 | Uruguay18 |
| Jersey1 | USA16 |
| Jordan18 | Uzbekistan18 |
| Kazakhstan18 | Vanuatu18 |
| Kenya18 | Vatican City State5 |
| Kirghizstan18 | Venezuela18 |
| Kiribati18 | Vietnam18 |
| Korea South18 | Virgin Islands (British)18 |
| Kosovo18 | Virgin Islands (USA)18 |
| Kuwait18 | Wake Island18 |
| Laos18 | Wales0 |
| Latvia6 | Wallis & Futuna Islands18 |
| Lebanon18 | Yemen18 |
| Liberia18 | Zambia18 |
| Libya18 | Zimbabwe18 |