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Discontinued codes are identified by a hyphen preceding the first letter in the code string.
| code | geographic area |
|---|---|
| a | Asia |
| a-af | Afghanistan |
| a-ai | Armenia (Republic) |
| a-aj | Azerbaijan |
| a-ba | Bahrain |
| a-bg | Bangladesh |
| a-bn | Borneo |
| a-br | Burma |
| a-bt | Bhutan |
| a-bx | Brunei |
| a-cb | Cambodia |
| a-cc | China |
| a-cc-an | Anhui Sheng (China) |
| a-cc-ch | Zhejiang Sheng (China) |
| a-cc-cq | Chongqing (China) |
| a-cc-fu | Fujian Sheng (China) |
| a-cc-ha | Hainan Sheng (China) |
| a-cc-he | Heilongjiang Sheng (China) |
| a-cc-hh | Hubei Sheng (China) |
| a-cc-hk | Hong Kong (China) |
| a-cc-ho | Henan Sheng (China) |
| a-cc-hp | Hebei Sheng (China) |
| a-cc-hu | Hunan Sheng (China) |
| a-cc-im | Inner Mongolia (China) |
| a-cc-ka | Gansu Sheng (China) |
| a-cc-kc | Guangxi Zhuangzu Zizhiqu (China) |
| a-cc-ki | Jiangxi Sheng (China) |
| a-cc-kn | Guangdong Sheng (China) |
| a-cc-kr | Jilin Sheng (China) |
| a-cc-ku | Jiangsu Sheng (China) |
| a-cc-kw | Guizhou Sheng (China) |
| a-cc-lp | Liaoning Sheng (China) |
| a-cc-mh | Macau (China : Special Administrative Region) |
| a-cc-nn | Ningxia Huizu Zizhiqu (China) |
| a-cc-pe | Beijing (China) |
| a-cc-sh | Shanxi Sheng (China) |
| a-cc-sm | Shanghai (China) |
| a-cc-sp | Shandong Sheng (China) |
| a-cc-ss | Shaanxi Sheng (China) |
| a-cc-su | Xinjiang Uygur Zizhiqu (China) |
| a-cc-sz | Sichuan Sheng (China) |
| a-cc-ti | Tibet (China) |
| a-cc-tn | Tianjin (China) |
| a-cc-ts | Qinghai Sheng (China) |
| a-cc-yu | Yunnan Sheng (China) |
| a-ccg | Yangtze River (China) |
| a-cck | Kunlun Mountains (China and India) |
| a-ccp | Bo Hai (China) |
| a-ccs | Xi River (China) |
| a-ccy | Yellow River (China) |
| a-ce | Sri Lanka |
| a-ch | Taiwan |
| a-cy | Cyprus |
| a-em | Timor-Leste |
| a-gs | Georgia (Republic) |
| -a-hk | Hong Kong |
| a-ii | India |
| a-io | Indonesia |
| a-iq | Iraq |
| a-ir | Iran |
| a-is | Israel |
| a-ja | Japan |
| a-jo | Jordan |
| a-kg | Kyrgyzstan |
| a-kn | Korea (North) |
| a-ko | Korea (South) |
| a-kr | Korea |
| a-ku | Kuwait |
| a-kz | Kazakhstan |
| a-le | Lebanon |
| a-ls | Laos |
| -a-mh | Macao |
| a-mk | Oman |
| a-mp | Mongolia |
| a-my | Malaysia |
| a-np | Nepal |
| a-nw | New Guinea |
| -a-ok | Okinawa |
| a-ph | Philippines |
| a-pk | Pakistan |
| a-pp | Papua New Guinea |
| -a-pt | Portuguese Timor |
| a-qa | Qatar |
| a-si | Singapore |
| -a-sk | Sikkim |
| a-su | Saudi Arabia |
| a-sy | Syria |
| a-ta | Tajikistan |
| a-th | Thailand |
| a-tk | Turkmenistan |
| a-ts | United Arab Emirates |
| a-tu | Turkey |
| a-uz | Uzbekistan |
| -a-vn | Viet Nam, North |
| -a-vs | Viet Nam, South |
| a-vt | Vietnam |
| a-ye | Yemen (Republic) |
| -a-ys | Yemen (People's Democratic Republic) |
| aa | Amur River (China and Russia) |
| ab | Bengal, Bay of |
| ac | Asia, Central |
| ae | East Asia |
| af | Thailand, Gulf of |
| ag | Mekong River |
| ah | Himalaya Mountains |
| ai | Indochina |
| ak | Caspian Sea |
| am | Malaya |
| an | East China Sea |
| ao | South China Sea |
| aopf | Paracel Islands |
| aoxp | Spratly Islands |
| ap | Persian Gulf |
| ar | Arabian Peninsula |
| as | Southeast Asia |
| at | Tien Shan |
| au | Arabian Sea |
| aw | Middle East |
| awba | West Bank |
| awgz | Gaza Strip |
| -awiu | Israel-Syria Demilitarized Zones |
| -awiw | Israel-Jordan Demilitarized Zones |
| -awiy | Iraq-Saudi Arabia Neutral Zone |
| ay | Yellow Sea |
| az | South Asia |
| b | Commonwealth countries |
| c | Intercontinental areas (Western Hemisphere) |
| cc | Caribbean Area; Caribbean Sea |
| cl | Latin America |
| -cm | Middle America |
| -cr | Circumcaribbean |
| d | Developing countries |
| dd | Developed countries |
| e | Europe |
| e-aa | Albania |
| e-an | Andorra |
| e-au | Austria |
| e-be | Belgium |
| e-bn | Bosnia and Herzegovina |
| e-bu | Bulgaria |
| e-bw | Belarus |
| e-ci | Croatia |
| e-cs | Czechoslovakia |
| e-dk | Denmark |
| e-er | Estonia |
| e-fi | Finland |
| e-fr | France |
| e-ge | Germany (East) |
| e-gi | Gibraltar |
| e-gr | Greece |
| e-gw | Germany (West) |
| e-gx | Germany |
| e-hu | Hungary |
| e-ic | Iceland |
| e-ie | Ireland |
| e-it | Italy |
| e-kv | Kosovo |
| e-lh | Liechtenstein |
| e-li | Lithuania |
| e-lu | Luxembourg |
| e-lv | Latvia |
| e-mc | Monaco |
| e-mm | Malta |
| e-mo | Montenegro |
| e-mv | Moldova |
| e-ne | Netherlands |
| e-no | Norway |
| e-pl | Poland |
| e-po | Portugal |
| e-rb | Serbia |
| e-rm | Romania |
| e-ru | Russia (Federation) |
| e-sm | San Marino |
| e-sp | Spain |
| e-sw | Sweden |
| e-sz | Switzerland |
| e-uk | Great Britain |
| e-uk-en | England |
| e-uk-ni | Northern Ireland |
| e-uk-st | Scotland |
| e-uk-ui | Great Britain Miscellaneous Island Dependencies |
| e-uk-wl | Wales |
| e-un | Ukraine |
| e-ur | Russia. Russian Empire. Soviet Union. Former Soviet Republics |
| -e-ur-ai | Armenia (Republic) |
| -e-ur-aj | Azerbaijan |
| -e-ur-bw | Belarus |
| -e-ur-er | Estonia |
| -e-ur-gs | Georgia (Republic) |
| -e-ur-kg | Kyrgyzstan |
| -e-ur-kz | Kazakhstan |
| -e-ur-li | Lithuania |
| -e-ur-lv | Latvia |
| -e-ur-mv | Moldova |
| -e-ur-ru | Russia (Federation) |
| -e-ur-ta | Tajikistan |
| -e-ur-tk | Turkmenistan |
| -e-ur-un | Ukraine |
| -e-ur-uz | Uzbekistan |
| e-urc | Central Chernozem Region (Russia) |
| e-ure | Siberia, Eastern (Russia) |
| e-urf | Russian Far East (Russia) |
| e-urk | Caucasus |
| -e-url | Central Region, RSFSR |
| e-urn | Soviet Union, Northwestern |
| -e-uro | Soviet Central Asia |
| e-urp | Volga River (Russia) |
| e-urr | Caucasus, Northern (Russia) |
| e-urs | Siberia (Russia) |
| e-uru | Ural Mountains (Russia) |
| -e-urv | Volgo-Viatskii Region, RSFSR |
| e-urw | Siberia, Western (Russia) |
| e-vc | Vatican City |
| e-xn | Macedonia (Republic) |
| e-xo | Slovakia |
| e-xr | Czech Republic |
| e-xv | Slovenia |
| e-yu | Serbia and Montenegro; Yugoslavia |
| ea | Alps |
| eb | Baltic States |
| ec | Europe, Central |
| ed | Balkan Peninsula |
| ee | Europe, Eastern |
| -ei | Iberian Peninsula |
| el | Benelux countries |
| en | Europe, Northern |
| eo | Danube River |
| ep | Pyrenees |
| er | Rhine River |
| es | Europe, Southern |
| -et | Europe, East Central |
| ev | Scandinavia |
| ew | Europe, Western |
| f | Africa |
| f-ae | Algeria |
| f-ao | Angola |
| f-bd | Burundi |
| f-bs | Botswana |
| -f-by | Biafra |
| f-cd | Chad |
| f-cf | Congo (Brazzaville) |
| f-cg | Congo (Democratic Republic) |
| f-cm | Cameroon |
| f-cx | Central African Republic |
| f-dm | Benin |
| f-ea | Eritrea |
| f-eg | Equatorial Guinea |
| f-et | Ethiopia |
| f-ft | Djibouti |
| f-gh | Ghana |
| f-gm | Gambia |
| f-go | Gabon |
| f-gv | Guinea |
| -f-if | Ifni |
| f-iv | Côte d'Ivoire |
| f-ke | Kenya |
| f-lb | Liberia |
| f-lo | Lesotho |
| f-ly | Libya |
| f-mg | Madagascar |
| f-ml | Mali |
| f-mr | Morocco |
| f-mu | Mauritania |
| f-mw | Malawi |
| f-mz | Mozambique |
| f-ng | Niger |
| f-nr | Nigeria |
| f-pg | Guinea-Bissau |
| f-rh | Zimbabwe |
| f-rw | Rwanda |
| f-sa | South Africa |
| f-sd | South Sudan |
| f-sf | Sao Tome and Principe |
| f-sg | Senegal |
| f-sh | Spanish North Africa |
| f-sj | Sudan |
| f-sl | Sierra Leone |
| f-so | Somalia |
| f-sq | Swaziland |
| f-ss | Western Sahara |
| f-sx | Namibia |
| f-tg | Togo |
| f-ti | Tunisia |
| f-tz | Tanzania |
| f-ua | Egypt |
| f-ug | Uganda |
| f-uv | Burkina Faso |
| f-za | Zambia |
| fa | Atlas Mountains |
| fb | Africa, Sub-Saharan |
| fc | Africa, Central |
| fd | Sahara |
| fe | Africa, Eastern |
| ff | Africa, North |
| fg | Congo River |
| fh | Africa, Northeast |
| fi | Niger River |
| fl | Nile River |
| fn | Sudan (Region) |
| fq | Africa, French-speaking Equatorial |
| fr | Great Rift Valley |
| fs | Africa, Southern |
| fu | Suez Canal (Egypt) |
| fv | Volta River (Ghana) |
| fw | Africa, West |
| fz | Zambezi River |
| h | French Community |
| i | Indian Ocean |
| i-bi | British Indian Ocean Territory |
| i-cq | Comoros |
| i-fs | Terres australes et antarctiques françaises |
| i-hm | Heard and McDonald Islands |
| i-mf | Mauritius |
| i-my | Mayotte |
| i-re | Réunion |
| i-se | Seychelles |
| i-xa | Christmas Island (Indian Ocean) |
| i-xb | Cocos (Keeling) Islands |
| i-xc | Maldives |
| -i-xo | Socotra Island |
| l | Atlantic Ocean |
| ln | North Atlantic Ocean |
| lnaz | Azores |
| lnbm | Bermuda Islands |
| lnca | Canary Islands |
| lncv | Cabo Verde |
| lnfa | Faroe Islands |
| lnjn | Jan Mayen Island |
| lnma | Madeira Islands |
| lnsb | Svalbard (Norway) |
| ls | South Atlantic Ocean |
| lsai | Ascension Island (Atlantic Ocean) |
| lsbv | Bouvet Island |
| lsfk | Falkland Islands |
| lstd | Tristan da Cunha |
| lsxj | Saint Helena |
| lsxs | South Georgia and South Sandwich Islands |
| m | Intercontinental areas (Eastern Hemisphere) |
| ma | Arab countries |
| mb | Black Sea |
| me | Eurasia |
| mm | Mediterranean Region; Mediterranean Sea |
| mr | Red Sea |
| n | North America |
| n-cn | Canada |
| n-cn-ab | Alberta |
| n-cn-bc | British Columbia |
| n-cn-mb | Manitoba |
| n-cn-nf | Newfoundland and Labrador |
| n-cn-nk | New Brunswick |
| n-cn-ns | Nova Scotia |
| n-cn-nt | Northwest Territories |
| n-cn-nu | Nunavut |
| n-cn-on | Ontario |
| n-cn-pi | Prince Edward Island |
| n-cn-qu | Québec (Province) |
| n-cn-sn | Saskatchewan |
| n-cn-yk | Yukon Territory |
| n-cnh | Hudson Bay |
| n-cnm | Maritime Provinces |
| n-cnp | Prairie Provinces |
| n-gl | Greenland |
| n-mx | Mexico |
| n-us | United States |
| n-us-ak | Alaska |
| n-us-al | Alabama |
| n-us-ar | Arkansas |
| n-us-az | Arizona |
| n-us-ca | California |
| n-us-co | Colorado |
| n-us-ct | Connecticut |
| n-us-dc | Washington (D.C.) |
| n-us-de | Delaware |
| n-us-fl | Florida |
| n-us-ga | Georgia |
| n-us-hi | Hawaii |
| n-us-ia | Iowa |
| n-us-id | Idaho |
| n-us-il | Illinois |
| n-us-in | Indiana |
| n-us-ks | Kansas |
| n-us-ky | Kentucky |
| n-us-la | Louisiana |
| n-us-ma | Massachusetts |
| n-us-md | Maryland |
| n-us-me | Maine |
| n-us-mi | Michigan |
| n-us-mn | Minnesota |
| n-us-mo | Missouri |
| n-us-ms | Mississippi |
| n-us-mt | Montana |
| n-us-nb | Nebraska |
| n-us-nc | North Carolina |
| n-us-nd | North Dakota |
| n-us-nh | New Hampshire |
| n-us-nj | New Jersey |
| n-us-nm | New Mexico |
| n-us-nv | Nevada |
| n-us-ny | New York |
| n-us-oh | Ohio |
| n-us-ok | Oklahoma |
| n-us-or | Oregon |
| n-us-pa | Pennsylvania |
| n-us-ri | Rhode Island |
| n-us-sc | South Carolina |
| n-us-sd | South Dakota |
| n-us-tn | Tennessee |
| n-us-tx | Texas |
| n-us-ut | Utah |
| n-us-va | Virginia |
| n-us-vt | Vermont |
| n-us-wa | Washington (State) |
| n-us-wi | Wisconsin |
| n-us-wv | West Virginia |
| n-us-wy | Wyoming |
| n-usa | Appalachian Mountains |
| n-usc | Middle West |
| n-use | Northeastern States |
| n-usl | Middle Atlantic States |
| n-usm | Mississippi River |
| n-usn | New England |
| n-uso | Ohio River |
| n-usp | West (U.S.) |
| n-usr | East (U.S.) |
| n-uss | Missouri River |
| n-ust | Southwest, New |
| n-usu | Southern States |
| -n-usw | Northwest (U.S.) |
| n-xl | Saint Pierre and Miquelon |
| nc | Central America |
| ncbh | Belize |
| nccr | Costa Rica |
| nccz | Canal Zone |
| nces | El Salvador |
| ncgt | Guatemala |
| ncho | Honduras |
| ncnq | Nicaragua |
| ncpn | Panama |
| nl | Great Lakes (North America); Lake States |
| nm | Mexico, Gulf of |
| np | Great Plains |
| nr | Rocky Mountains |
| nw | West Indies |
| nwaq | Antigua and Barbuda |
| nwaw | Aruba |
| nwbb | Barbados |
| -nwbc | Barbuda |
| nwbf | Bahamas |
| nwbn | Bonaire |
| nwcj | Cayman Islands |
| nwco | Curaçao |
| nwcu | Cuba |
| nwdq | Dominica |
| nwdr | Dominican Republic |
| nweu | Sint Eustatius |
| -nwga | Greater Antilles |
| nwgd | Grenada |
| nwgp | Guadeloupe |
| -nwgs | Grenadines |
| nwhi | Hispaniola |
| nwht | Haiti |
| nwjm | Jamaica |
| nwla | Antilles, Lesser |
| nwli | Leeward Islands (West Indies) |
| nwmj | Montserrat |
| nwmq | Martinique |
| -nwna | Netherlands Antilles |
| nwpr | Puerto Rico |
| -nwsb | Saint-Barthélemy |
| nwsc | Saint-Barthélemy |
| nwsd | Saba |
| nwsn | Sint Maarten |
| nwst | Saint-Martin |
| nwsv | Swan Islands (Honduras) |
| nwtc | Turks and Caicos Islands |
| nwtr | Trinidad and Tobago |
| nwuc | United States Miscellaneous Caribbean Islands |
| nwvb | British Virgin Islands |
| nwvi | Virgin Islands of the United States |
| -nwvr | Virgin Islands |
| nwwi | Windward Islands (West Indies) |
| nwxa | Anguilla |
| nwxi | Saint Kitts and Nevis |
| nwxk | Saint Lucia |
| nwxm | Saint Vincent and the Grenadines |
| p | Pacific Ocean |
| pn | North Pacific Ocean |
| po | Oceania |
| poas | American Samoa |
| pobp | Solomon Islands |
| poci | Caroline Islands |
| -pocp | Canton and Enderbury Islands |
| pocw | Cook Islands |
| poea | Easter Island |
| pofj | Fiji |
| pofp | French Polynesia |
| pogg | Galapagos Islands |
| -pogn | Gilbert and Ellice Islands |
| pogu | Guam |
| poji | Johnston Island |
| pokb | Kiribati |
| poki | Kermadec Islands |
| poln | Line Islands |
| pome | Melanesia |
| pomi | Micronesia (Federated States) |
| ponl | New Caledonia |
| ponn | Vanuatu |
| ponu | Nauru |
| popc | Pitcairn Island |
| popl | Palau |
| pops | Polynesia |
| -pory | Ryukyu Islands, Southern |
| -posc | Santa Cruz Islands |
| posh | Samoan Islands |
| -posn | Solomon Islands |
| potl | Tokelau |
| poto | Tonga |
| pott | Micronesia |
| potv | Tuvalu |
| poup | United States Miscellaneous Pacific Islands |
| powf | Wallis and Futuna Islands |
| powk | Wake Island |
| pows | Samoa |
| poxd | Mariana Islands |
| poxe | Marshall Islands |
| poxf | Midway Islands |
| poxh | Niue |
| ps | South Pacific Ocean |
| q | Cold regions |
| r | Arctic Ocean; Arctic regions |
| s | South America |
| s-ag | Argentina |
| s-bl | Brazil |
| s-bo | Bolivia |
| s-ck | Colombia |
| s-cl | Chile |
| s-ec | Ecuador |
| s-fg | French Guiana |
| s-gy | Guyana |
| s-pe | Peru |
| s-py | Paraguay |
| s-sr | Suriname |
| s-uy | Uruguay |
| s-ve | Venezuela |
| sa | Amazon River |
| sn | Andes |
| sp | Rio de la Plata (Argentina and Uruguay) |
| t | Antarctic Ocean; Antarctica |
| -t-ay | Antarctica |
| u | Australasia |
| u-ac | Ashmore and Cartier Islands |
| u-at | Australia |
| u-at-ac | Australian Capital Territory |
| u-atc | Central Australia |
| u-ate | Eastern Australia |
| u-atn | Northern Australia |
| u-at-ne | New South Wales |
| u-at-no | Northern Territory |
| u-at-qn | Queensland |
| u-at-sa | South Australia |
| u-at-tm | Tasmania |
| u-at-vi | Victoria |
| u-at-we | Western Australia |
| u-cs | Coral Sea Islands |
| u-nz | New Zealand |
| -v | Communist countries |
| w | Tropics |
| x | Earth |
| xa | Eastern Hemisphere |
| xb | Northern Hemisphere |
| xc | Southern Hemisphere |
| xd | Western Hemisphere |
| zd | Deep space |
| zju | Jupiter |
| zma | Mars |
| zme | Mercury |
| zmo | Moon |
| zne | Neptune |
| zo | Outer space |
| zpl | Pluto |
| zs | Solar system |
| zsa | Saturn |
| zsu | Sun |
| zur | Uranus |
| zve | Venus |
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