| 0 | Elsewhere |
| 4 | Afghanistan |
| 8 | Albania |
| 10 | Antarctica |
| 12 | Algeria |
| 16 | American Samoa |
| 20 | Andorra |
| 24 | Angola |
| 28 | Antigua and Barbuda |
| 31 | Azerbaijan |
| 32 | Argentina |
| 36 | Australia |
| 40 | Austria |
| 44 | Bahamas, The |
| 48 | Bahrain |
| 50 | Bangladesh |
| 51 | Armenia |
| 52 | Barbados |
| 56 | Belgium |
| 60 | Bermuda |
| 64 | Bhutan |
| 68 | Bolivia |
| 70 | Bosnia and Herzegovina |
| 72 | Botswana |
| 74 | Bouvet Island |
| 76 | Brazil |
| 84 | Belize |
| 86 | British Indian Ocean Territory |
| 90 | Solomon Islands |
| 92 | British Virgin Islands |
| 96 | Brunei |
| 100 | Bulgaria |
| 104 | Myanmar (Burma) |
| 108 | Burundi |
| 112 | Belarus |
| 116 | Cambodia |
| 120 | Cameroon |
| 124 | Canada |
| 132 | Cape Verde |
| 136 | Cayman Islands |
| 140 | Central African Republic |
| 144 | Sri Lanka |
| 148 | Chad |
| 152 | Chile |
| 156 | China |
| 158 | Taiwan |
| 162 | Christmas Island |
| 166 | Cocos (Keeling) Islands |
| 170 | Colombia |
| 174 | Comoros |
| 175 | Mayotte |
| 178 | Congo |
| 180 | Congo (Democratic Republic) |
| 184 | Cook Islands |
| 188 | Costa Rica |
| 191 | Croatia |
| 192 | Cuba |
| 203 | Czechia |
| 204 | Benin |
| 208 | Denmark |
| 212 | Dominica |
| 214 | Dominican Republic |
| 218 | Ecuador |
| 222 | El Salvador |
| 226 | Equatorial Guinea |
| 231 | Ethiopia |
| 232 | Eritrea |
| 233 | Estonia |
| 234 | Faroe Islands |
| 238 | Falkland Islands |
| 239 | South Georgia and the South Sandwich Islands |
| 242 | Fiji |
| 246 | Finland |
| 248 | ?land Islands |
| 250 | France |
| 254 | French Guiana |
| 258 | French Polynesia |
| 260 | French Southern Territories |
| 262 | Djibouti |
| 266 | Gabon |
| 268 | Georgia |
| 270 | Gambia, The |
| 275 | Occupied Palestinian Territories |
| 276 | Germany |
| 288 | Ghana |
| 292 | Gibraltar |
| 296 | Kiribati |
| 300 | Greece |
| 304 | Greenland |
| 308 | Grenada |
| 312 | Guadeloupe |
| 316 | Guam |
| 320 | Guatemala |
| 324 | Guinea |
| 328 | Guyana |
| 332 | Haiti |
| 334 | Heard Island and McDonald Islands |
| 336 | Vatican City |
| 340 | Honduras |
| 344 | Hong Kong (Special administrative region of China) |
| 348 | Hungary |
| 352 | Iceland |
| 356 | India |
| 360 | Indonesia |
| 364 | Iran |
| 368 | Iraq |
| 372 | Ireland |
| 373 | Island of Ireland (Not otherwise specified) |
| 376 | Israel |
| 380 | Italy |
| 384 | Ivory Coast |
| 388 | Jamaica |
| 392 | Japan |
| 398 | Kazakhstan |
| 400 | Jordan |
| 404 | Kenya |
| 408 | Korea (North) |
| 410 | Korea (South) |
| 414 | Kuwait |
| 417 | Kyrgyzstan |
| 418 | Laos |
| 422 | Lebanon |
| 426 | Lesotho |
| 428 | Latvia |
| 430 | Liberia |
| 434 | Libya |
| 438 | Liechtenstein |
| 440 | Lithuania |
| 442 | Luxembourg |
| 446 | Macao (Special administrative region of China) |
| 450 | Madagascar |
| 454 | Malawi |
| 458 | Malaysia |
| 462 | Maldives |
| 466 | Mali |
| 470 | Malta |
| 474 | Martinique |
| 478 | Mauritania |
| 480 | Mauritius |
| 484 | Mexico |
| 492 | Monaco |
| 496 | Mongolia |
| 498 | Moldova |
| 499 | Montenegro |
| 500 | Montserrat |
| 504 | Morocco |
| 508 | Mozambique |
| 512 | Oman |
| 516 | Namibia |
| 520 | Nauru |
| 524 | Nepal |
| 528 | Netherlands |
| 531 | Curacao |
| 533 | Aruba |
| 534 | Sint Maarten (Dutch Part) |
| 535 | Bonaire, Sint Eustatius and Saba |
| 540 | New Caledonia |
| 548 | Vanuatu |
| 554 | New Zealand |
| 558 | Nicaragua |
| 562 | Niger |
| 566 | Nigeria |
| 570 | Niue |
| 574 | Norfolk Island |
| 578 | Norway |
| 580 | Northern Mariana Islands |
| 582 | United States minor outlying islands |
| 583 | Micronesia |
| 584 | Marshall Islands |
| 585 | Palau |
| 586 | Pakistan |
| 591 | Panama |
| 598 | Papua New Guinea |
| 600 | Paraguay |
| 604 | Peru |
| 608 | Philippines |
| 612 | Pitcairn, Henderson, Ducie and Oeno Islands |
| 616 | Poland |
| 620 | Portugal |
| 624 | Guinea-Bissau |
| 626 | East Timor |
| 630 | Puerto Rico |
| 634 | Qatar |
| 638 | R?union |
| 642 | Romania |
| 643 | Russia |
| 646 | Rwanda |
| 652 | St Barth?lemy |
| 654 | St Helena, Ascension and Tristan da Cunha |
| 659 | St Kitts and Nevis |
| 660 | Anguilla |
| 662 | St Lucia |
| 663 | St Martin (French part) |
| 666 | St Pierre and Miquelon |
| 670 | St Vincent and the Grenadines |
| 674 | San Marino |
| 678 | Sao Tome and Principe |
| 682 | Saudi Arabia |
| 686 | Senegal |
| 688 | Serbia |
| 690 | Seychelles |
| 694 | Sierra Leone |
| 702 | Singapore |
| 703 | Slovakia |
| 704 | Vietnam |
| 705 | Slovenia |
| 706 | Somalia |
| 710 | South Africa |
| 716 | Zimbabwe |
| 728 | South Sudan |
| 729 | Sudan |
| 732 | Western Sahara |
| 740 | Suriname |
| 744 | Svalbard and Jan Mayen |
| 748 | Eswatini |
| 752 | Sweden |
| 756 | Switzerland |
| 760 | Syria |
| 762 | Tajikistan |
| 764 | Thailand |
| 768 | Togo |
| 772 | Tokelau |
| 776 | Tonga |
| 780 | Trinidad and Tobago |
| 784 | United Arab Emirates |
| 788 | Tunisia |
| 792 | Turkey |
| 795 | Turkmenistan |
| 796 | Turks and Caicos Islands |
| 798 | Tuvalu |
| 800 | Uganda |
| 804 | Ukraine |
| 807 | Macedonia |
| 828 | Egypt |
| 831 | Guernsey |
| 832 | Jersey |
| 833 | Isle of Man |
| 834 | Tanzania |
| 840 | United States |
| 850 | United States Virgin Islands |
| 854 | Burkina Faso |
| 858 | Uruguay |
| 860 | Uzbekistan |
| 862 | Venezuela |
| 876 | Wallis and Futuna |
| 882 | Samoa |
| 887 | Yemen |
| 894 | Zambia |
| 901 | Cyprus (European Union) |
| 902 | Cyprus (Non-European Union) |
| 903 | Cyprus (Not otherwise specified) |
| 911 | Spain (Except Canary Islands) |
| 912 | Canary Islands |
| 913 | Spain (Not otherwise specified) |
| 921 | England |
| 922 | Northern Ireland |
| 923 | Scotland |
| 924 | Wales |
| 925 | Great Britain (Not otherwise specified) |
| 926 | United Kingdom (Not otherwise specified) |
| 931 | Channel Islands (Not otherwise specified) |
| 951 | Kosovo |
| 971 | Czechoslovakia (Not otherwise specified) |
| 972 | Union of Soviet Socialist Republics (Not otherwise specified) |
| 973 | Yugoslavia (Not otherwise specified) |
| 974 | Serbia and Montenegro (Not otherwise specified) |
| 981 | Europe (Not otherwise specified) |
| 982 | Africa (Not otherwise specified) |
| 983 | Middle East (Not otherwise specified) |
| 984 | Asia (Except Middle East) (Not otherwise specified) |
| 985 | North America (Not otherwise specified) |
| 986 | Central America (Not otherwise specified) |
| 987 | South America (Not otherwise specified) |
| 988 | Caribbean (Not otherwise specified) |
| 989 | Antarctica and Oceania (Not otherwise specified) |
| 991 | At sea |
| 992 | In the air |
| 999 | Netherlands Antilles Not Otherwise Specified |
| -6 | Missing |
| -9 | No code required (Students not at their term-time address) |
