The radiocommunication division of the International Telecommunication Union uses the following letter codes to identify its member countries. Eight countries are assigned single-letter codes (
B, 
D, 
E, 
F, 
G, 
I, 
J, 
S), while the rest have codes three letters in length.
| Code | Country |
|---|---|
| A | |
| AFG |  Afghanistan
|
| AFS |  South Africa (Republic of)
|
| AGL |  Angola (Republic of)
|
| ALB |  Albania (Republic of)
|
| ALG |  Algeria (People's Democratic Republic of)
|
| AND |  Andorra (Principality of)
|
| ARG |  Argentine Republic
|
| ARM |  Armenia (Republic of)
|
| ARS |  Saudi Arabia (Kingdom of)
|
| ATG |  Antigua and Barbuda
|
| AUS |  Australia
|
| AUT |  Austria
|
| AZE |  Azerbaijan (Republic of)
|
| B | |
| B | Brazil (Federative Republic of)
|
| BAH |  Bahamas (Commonwealth of the)
|
| BDI |  Burundi (Republic of)
|
| BEL |  Belgium
|
| BEN |  Benin (Republic of)
|
| BFA |  Burkina Faso
|
| BGD |  Bangladesh (People's Republic of)
|
| BHR |  Bahrain (Kingdom of)
|
| BIH |  Bosnia and Herzegovina
|
| BLR |  Belarus (Republic of)
|
| BLZ |  Belize
|
| BOL |  Bolivia (Plurinational State of)
|
| BOT |  Botswana (Republic of)
|
| BRB |  Barbados
|
| BRM |  Myanmar (Union of)
|
| BRU |  Brunei Darussalam
|
| BTN |  Bhutan (Kingdom of)
|
| BUL |  Bulgaria (Republic of)
|
| C | |
| CAF |  Central African Republic
|
| CAN |  Canada
|
| CBG |  Cambodia (Kingdom of)
|
| CHL |  Chile
|
| CHN |  China (People's Republic of)
|
| CLM |  Colombia (Republic of)
|
| CLN |  Sri Lanka (Democratic Socialist Republic of)
|
| CME |  Cameroon (Republic of)
|
| COD |  Democratic Republic of the Congo
|
| COG |  Congo (Republic of the)
|
| COM |  Comoros (Union of the)
|
| CPV |  Cabo Verde (Republic of)
|
| CTI |  Côte d'Ivoire (Republic of)
|
| CTR |  Costa Rica
|
| CUB |  Cuba
|
| CVA |  Vatican City
|
| CYP |  Cyprus (Republic of)
|
| CZE |  Czech Republic
|
| D | |
| D | Germany (Federal Republic of)
|
| DJI |  Djibouti (Republic of)
|
| DMA |  Dominica (Commonwealth of)
|
| DNK |  Denmark
|
| DOM |  Dominican Republic
|
| E | |
| E | Spain
|
| EGY |  Egypt (Arab Republic of)
|
| EQA |  Ecuador
|
| ERI |  Eritrea
|
| EST |  Estonia (Republic of)
|
| ETH |  Ethiopia (Federal Democratic Republic of)
|
| F | |
| F | France
|
| FIN |  Finland
|
| FJI |  Fiji (Republic of)
|
| FSM |  Micronesia (Federated States of)
|
| G | |
| G | United Kingdom of Great Britain and Northern Ireland
|
| GAB |  Gabon
|
| GEO |  Georgia
|
| GHA |  Ghana
|
| GMB |  Gambia (Republic of the)
|
| GNB |  Guinea-Bissau (Republic of)
|
| GNE |  Equatorial Guinea (Republic of)
|
| GRC |  Greece
|
| GRD |  Grenada
|
| GTM |  Guatemala (Republic of)
|
| GUI |  Guinea (Republic of)
|
| GUY |  Guyana
|
| H | |
| HND |  Honduras (Republic of)
|
| HNG |  Hungary
|
| HOL |  Netherlands (Kingdom of the)
|
| HRV |  Croatia (Republic of)
|
| HTI |  Haiti (Republic of)
|
| I | |
| I | Italy
|
| IND |  India (Republic of)
|
| INS |  Indonesia (Republic of)
|
| IRL |  Ireland
|
| IRN |  Iran (Islamic Republic of)
|
| IRQ |  Iraq (Republic of)
|
| ISL |  Iceland
|
| ISR |  Israel (State of)
|
| J | |
| J | Japan
|
| JMC |  Jamaica
|
| JOR |  Jordan (Hashemite Kingdom of)
|
| K | |
| KAZ |  Kazakhstan (Republic of)
|
| KEN |  Kenya (Republic of)
|
| KGZ |  Kyrgyz Republic
|
| KIR |  Kiribati (Republic of)
|
| KNA |  Saint Kitts and Nevis (Federation of)
|
| KOR |  Korea (Republic of)
|
| KRE |  Democratic People's Republic of Korea
|
| KWT |  Kuwait (State of)
|
| L | |
| LAO |  Lao People's Democratic Republic
|
| LBN |  Lebanon
|
| LBR |  Liberia (Republic of)
|
| LBY |  Libya (State of)
|
| LCA |  Saint Lucia
|
| LIE |  Liechtenstein (Principality of)
|
| LSO |  Lesotho (Kingdom of)
|
| LTU |  Lithuania (Republic of)
|
| LUX |  Luxembourg
|
| LVA |  Latvia (Republic of)
|
| M | |
| MAU |  Mauritius (Republic of)
|
| MCO |  Monaco (Principality of)
|
| MDA |  Moldova (Republic of)
|
| MDG |  Madagascar (Republic of)
|
| MEX |  Mexico
|
| MHL |  Marshall Islands (Republic of the)
|
| MKD |  North Macedonia (Republic of)
|
| MLA |  Malaysia
|
| MLD |  Maldives (Republic of)
|
| MLI |  Mali (Republic of)
|
| MLT |  Malta
|
| MNE |  Montenegro
|
| MNG |  Mongolia
|
| MOZ |  Mozambique (Republic of)
|
| MRC |  Morocco (Kingdom of)
|
| MTN |  Mauritania (Islamic Republic of)
|
| MWI |  Malawi
|
| N | |
| NCG |  Nicaragua
|
| NGR |  Niger (Republic of the)
|
| NIG |  Nigeria (Federal Republic of)
|
| NMB |  Namibia (Republic of)
|
| NOR |  Norway
|
| NPL |  Nepal (Federal Democratic Republic of)
|
| NRU |  Nauru (Republic of)
|
| NZL |  New Zealand
|
| O | |
| OMA |  Oman (Sultanate of)
|
| P | |
| PAK |  Pakistan (Islamic Republic of)
|
| PHL |  Philippines (Republic of the)
|
| PNG |  Papua New Guinea
|
| PNR |  Panama (Republic of)
|
| POL |  Poland (Republic of)
|
| POR |  Portugal
|
| PRG |  Paraguay (Republic of)
|
| PRU |  Peru
|
| Q | |
| QAT |  Qatar (State of)
|
| R | |
| ROU |  Romania
|
| RRW |  Rwanda (Republic of)
|
| RUS |  Russian Federation
|
| S | |
| S | Sweden
|
| SDN |  Sudan (Republic of the)
|
| SEN |  Senegal (Republic of)
|
| SEY |  Seychelles (Republic of)
|
| SLM |  Solomon Islands
|
| SLV |  El Salvador (Republic of)
|
| SMO |  Samoa (Independent State of)
|
| SMR |  San Marino (Republic of)
|
| SNG |  Singapore (Republic of)
|
| SOM |  Somalia (Federal Republic of)
|
| SRB |  Serbia (Republic of)
|
| SRL |  Sierra Leone
|
| SSD |  South Sudan (Republic of)
|
| STP |  Sao Tome and Principe (Democratic Republic of)
|
| SUI |  Switzerland (Confederation of)
|
| SUR |  Suriname (Republic of)
|
| SVK |  Slovak Republic
|
| SVN |  Slovenia (Republic of)
|
| SWZ |  Eswatini (Kingdom of)
|
| SYR |  Syrian Arab Republic
|
| T | |
| TCD |  Chad (Republic of)
|
| TGO |  Togolese Republic
|
| THA |  Thailand
|
| TJK |  Tajikistan (Republic of)
|
| TKM |  Turkmenistan
|
| TLS |  Timor-Leste (Democratic Republic of)
|
| TON |  Tonga (Kingdom of)
|
| TRD |  Trinidad and Tobago
|
| TUN |  Tunisia
|
| TUR |  Republic of Türkiye
|
| TUV |  Tuvalu
|
| TZA |  Tanzania (United Republic of)
|
| U | |
| UAE |  United Arab Emirates
|
| UGA |  Uganda (Republic of)
|
| UKR |  Ukraine
|
| URG |  Uruguay (Eastern Republic of)
|
| USA |  United States of America
|
| UZB |  Uzbekistan (Republic of)
|
| V | |
| VCT |  Saint Vincent and the Grenadines
|
| VEN |  Venezuela (Bolivarian Republic of)
|
| VTN |  Vietnam (Socialist Republic of)
|
| VUT |  Vanuatu (Republic of)
|
| W | |
| X | |
| Y | |
| YEM |  Yemen (Republic of)
|
| Z | |
| ZMB |  Zambia (Republic of)
|
| ZWE |  Zimbabwe (Republic of)
|
The ITU also designates the following codes for other areas around the world that are not member states.
| Code | Area |
|---|---|
| A | |
| ABW |  Aruba
|
| AIA |  Anguilla
|
| ALS |  Alaska (State of)
|
| AMS |  Saint Paul and Amsterdam Islands
|
| AOE | / Western Sahara
|
| ASC |  Ascension Island
|
| ATA |  Antarctic
|
| AZR |  Azores
|
| B | |
| BER |  Bermuda
|
| BIO |  Chagos Islands (Indian Ocean)
|
| BLM | Saint Barthélemy (French Department of)
|
| BVT | Bouvet Island
|
| C | |
| CG7 | CUB(Guantanamo) (7).[6] |
| CHR |  Christmas Island (Indian Ocean)
|
| CKH |  Cook Islands
|
| CNR |  Canary Islands
|
| CPT | Clipperton Island
|
| CRO | Crozet Archipelago
|
| CYM |  Cayman Islands
|
| D | |
| DGA | Diego Garcia
|
| E | |
| F | |
| FLK |  Falkland Islands (Malvinas)
|
| FRO |  Faroe Islands
|
| G | |
| GCA | United Kingdom (Non-metropolitan) – Region 1
|
| GCC | United Kingdom – Region 3
|
| GIB |  Gibraltar
|
| GRL |  Greenland
|
| GUF | Guiana (French Department of)
|
| GUM |  Guam
|
| H | |
| HKG |  Hong Kong (Special Administrative Region of China)
|
| HMD | Heard and McDonald Islands
|
| HWA |  Hawaii (State of)
|
| HWL | Howland Island
|
| I | |
| ICO |  Cocos (Keeling) Islands
|
| J | |
| JAR | Jarvis Island
|
| JON | Johnston Island
|
| K | |
| KER | Kerguelen Islands
|
| L | |
| M | |
| MAC |  Macau (Special Administrative Region of China)
|
| MDR |  Madeira
|
| MDW | Midway Islands
|
| MRA |  Northern Mariana Islands (Commonwealth of the)
|
| MRN | Marion Island
|
| MRT | Martinique (French Department of)
|
| MSR |  Montserrat
|
| MYT | Mayotte (Territorial Collectivity of)
|
| N | |
| NCL | New Caledonia
|
| NFK |  Norfolk Island
|
| NIU |  Niue
|
| O | |
| OCE |  French Polynesia
|
| P | |
| PAQ |  Easter Island
|
| PHX | Phoenix Islands
|
| PLM | Palmyra Island
|
| PLW |  Palau (Republic of)[7]
|
| PTC |  Pitcairn Island
|
| PTR |  Puerto Rico
|
| Q | |
| R | |
| REU | Reunion (French Department of)
|
| ROD | Rodrigues
|
| S | |
| SCG | ex  Serbia and Montenegro → SRB, MNE
|
| SHN |  Saint Helena
|
| SMA |  American Samoa
|
| SPM | Saint Pierre and Miquelon (Territorial Collectivity of)
|
| SWN | Swan Islands
|
| SXM |  Sint Maarten (Dutch part)
|
| T | |
| TCA |  Turks and Caicos Islands
|
| TKL |  Tokelau
|
| TRC |  Tristan da Cunha
|
| U | |
| V | |
| VIR |  United States Virgin Islands
|
| VRG |  British Virgin Islands
|
| W | |
| WAK | Wake Island
|
| WAL | Wallis and Futuna Islands
|
| X | |
| XAA | shared throughout the world |
| XAX | shared by several countries, but in a restricted area of the world |
| XBR | special use |
| XBY | / Abyei area
|
| XCQ | ex Caroline Islands → FSM + PLW |
| XCS | ex TCH Czechoslovakia → CZE + SVK
|
| XGZ |  Gaza Strip
|
| XMM | inter-ship communications |
| XOA | International Civil Aviation Organization |
| XR1 | Region 1 (RR 5.3) |
| XR2 | Region 2 (RR 5.4) |
| XR3 | Region 3 (RR 5.5) |
| XRY | Antarctic Region (RR AP 26/5.2)
|
| XSC | ex SCG Serbia and Montenegro
|
| XSD | ex Republic of the Sudan before 14 July 2011 → SDN + SSD |
| XSP | Spratly Islands |
| XSU | ex URS  Soviet Union → RUS + …
|
| XUN |  United Nations
|
| XWB | West Bank
|
| XWM | World Meteorological Organization
|
| XYU | ex YUG  Yugoslavia → SCG… + HRV + BIH + SVN
|
| XYZ | pending further developments regarding the administration responsible |
| XZZ | administrative status is subject to special arrangements |
| Y | |
| Z | |